---
product_id: 543000133
title: "Cosmic Byte CB-GK-21 Themis 61 Key Mechanical Per Key RGB Gaming Keyboard with Outemu Blue Switches and Software (Black)"
brand: "cosmic byte"
price: "S/.768"
currency: PEN
in_stock: true
reviews_count: 5
category: "Cosmic Byte"
url: https://www.desertcart.pe/products/543000133-cosmic-byte-cb-gk-21-themis-61-key-mechanical-per
store_origin: PE
region: Peru
---

# 50M+ key presses durability Per-key customizable RGB lighting USB-C wired connection Cosmic Byte CB-GK-21 Themis 61 Key Mechanical Per Key RGB Gaming Keyboard with Outemu Blue Switches and Software (Black)

**Brand:** cosmic byte
**Price:** S/.768
**Availability:** ✅ In Stock

## Summary

> 🌌 Elevate your desk game with Themis — where style meets precision!

## Quick Answers

- **What is this?** Cosmic Byte CB-GK-21 Themis 61 Key Mechanical Per Key RGB Gaming Keyboard with Outemu Blue Switches and Software (Black) by cosmic byte
- **How much does it cost?** S/.768 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/543000133-cosmic-byte-cb-gk-21-themis-61-key-mechanical-per)

## Best For

- cosmic byte enthusiasts

## Why This Product

- Trusted cosmic byte brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact 61-Key Layout:** Space-saving design perfect for sleek, modern workstations
- • **Anti-Ghosting Technology:** Simultaneous key presses registered flawlessly—no missed commands
- • **Dynamic RGB Customization:** Over 10 lighting modes with software macro control for ultimate personalization
- • **Durable Double-Shot Keycaps:** Injection molded for long-lasting vibrancy and wear resistance
- • **Precision Blue Outemu Switches:** Tactile, clicky feedback for pro-level typing & gaming

## Overview

The Cosmic Byte CB-GK-21 Themis is a compact 61-key mechanical keyboard featuring durable Outemu Blue switches rated for over 50 million keystrokes. It offers per-key RGB lighting customizable via dedicated software, anti-ghosting for flawless simultaneous key presses, and a modern USB-C wired connection. Designed for gamers and professionals craving a sleek, responsive typing experience without sacrificing desk space.

## Description

Product Description Features Compact Mechanical Keyboard. Blue Outemu Mechanical Key Switches. 61 keys Keyboard. 50 million + Operations for Each Key. Injection Molded Double-shot Color Keycaps. Simultaneous Operation for All Keys Without Any Key Ghosting Effects. Spectra RGB lighting effects, more than 10 LED lighting mode Win-Key Lock Windows Buttons can be disabled. Wired USB Connection for Laptops and PCs. Adjustable Backlight Brightness and Speed Software support to control Macros and customize RGB lights Specifications System: Windows, Mac Switch Life: OUTEMU 50 million times Number of Keys: 61keys US layout Product interface: USB C to USB A Cable: 1.5m Current consumption: max.200mA Size: 291 x 101 x 39mm Weight: 556g Technical Data Blue Switches Total stroke: 4.00mm Conducting stroke: 2.20±0.6mm Conducting strength: 50±10gf Tactile strength: 60±10gf Tactile stroke: 1.80mm Minimum triggering force: 30gf Min Termination strength: 65gf Max Manufacturer Contact Information Cosmic Byte, Prakash Warehousing, S. No.163, Hissa No 1-2-3-4-5A-5B/2/1, Phursungi, Pune 412308, Maharashtra, India. cc@thecosmicbyte.com

Review: One of the best Mechanical Blue Switch Keyboards in its price segment. - The positive's of this are: 1. The keys are tactile and responsive 2. Its very easy to clean 3. It feels quite durable. 4. Blue keys with very good sound. (Are very loud if use near to roommate/parents💀) 5. 10KL means less space, perfect for me in my gaming setup. My laptop already has all the other keys I would need. The negative points are: 1. There are no (flip) legs. 2. The keys are tightly secured to the keycaps and are somewhat difficult to remove if you don't have the correct tool and technique. 3. The backlight only shows up on the keys/numbers. The alternate key function (F1, F2, F3, etc) are printed with grey/white color, so unless you got direct light on the keyboard, they wont be visible with the backlight. 4. Little hard to find the shortcuts in the first few months, especially if you already had habit from another keyboard. If you get this KB for Rs 2300 or less, go for it. Its a good 10 keyless keyboard for gaming. If you are programmer or often use the keypad, then this is a poor choice of mechanical keyboard.
Review: Best budget 60% keyboard! - The review will be straightforward. I am using it for the past few months daily for gaming and coding mostly. I purchased the keyboard for Rs. 2,060 on desertcart. Delivery was on time but the package I recieved was tampered with, missing the UBS c cable and key cap puller. So I had to replace the product. Anyway received a good one later on. the keyboard shortcuts are inbuilt. fn+q = vol down fn+w = vol up fn+e = mute fn+z = previous/rewind fn+x = play pause fn+c = next/forward fn+v = stop fn+h = insert fn+b = delete fn+j = home fn+n = end fn+k = pageup fn+m = pagedown fn+i = scroll lock fn+o = numlock (don't know why even xD) fn+esc = `(tilde Here are the pros and cons of the keyboard. Pros. Compact. Doesn't take up much space on my table. Build quality is good enough for the price. Mechanical switches are blue outemu. Great sound. Braided cable is long enough. RGB with diffuser plate looks superb and bright with actual RGB controls not static row colors. All keys are anti ghosting. Tested myself. Cons. No height adjustable leverage on the back. No drainage hole beneath the keyboard. The spacebar kind of gives way after rough use. Double clicks sometimes but it's okay. Arrow keys are on the function key. So you have to press fn to use the arrow keys. The usb c port on the keyboard is a bit loose for my liking. Could have been in the frame or something. Overall best bang for buck budget 60% keyboard.

## Features

- Injection Molded Double-shot Color Keycaps
- Simultaneous Operation for All Keys Without Any Key Ghosting Effects
- Software support to control Macros and customize RGB lights
- Wired USB C Connection for Laptops and PCs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09SH9PS1G |
| Antenna Location | Gaming |
| Box Contents | USB Cable |
| Brand | Cosmic Byte |
| Brand Name | Cosmic Byte |
| Button Quantity | 61 |
| Colour | Black |
| Compatible Devices | Laptop, PC |
| Compatible devices | Laptop, PC |
| Connectivity Technology | USB-C |
| Connectivity technology | USB-C |
| Customer Reviews | 4.2 out of 5 stars 474 Reviews |
| Enclosure Material | Plastic |
| Hand Orientation | Ambidextrous |
| Importer Contact Information | Cosmic Byte, Prakash Warehousing, S. No.163, Hissa No 1-2-3-4-5A-5B/2/1, Phursungi, Pune 412308, Maharashtra, India 1800313007700 |
| Item Dimensions L x W x H | 29.1L x 10.1W x 3.9H centimetres |
| Item Type Name | Keyboard |
| Item Weight | 556 Grams |
| Keyboard Backlighting Color Support | RGB |
| Keyboard Description | Gaming |
| Keyboard Layout | QWERTY |
| Keyboard description | Gaming |
| Language | English |
| Manufacturer | Cosmic Byte |
| Manufacturer Contact Information | Cosmic Byte, Prakash Warehousing, S. No.163, Hissa No 1-2-3-4-5A-5B/2/1, Phursungi, Pune 412308, Maharashtra, India. cc@thecosmicbyte.com |
| Manufacturer Part Number | CB-GK-21 |
| Model Name | Themis |
| Model Number | Themis |
| Number of Keys | 61 |
| Packer Contact Information | Cosmic Byte, Prakash Warehousing, S. No.163, Hissa No 1-2-3-4-5A-5B/2/1, Phursungi, Pune 412308, Maharashtra, India 1800313007700 |
| Power Source | Wired |
| Product Features | Backlit, Ergonomic |
| Recommended uses for product | Gaming |
| Special feature | Backlit, Ergonomic |
| Style Name | Blue Switch |
| Switch Type | Clicky |
| Unit Count | 1.0 count |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Cosmic Byte
- **Colour:** Black
- **Compatible devices:** Laptop, PC
- **Connectivity technology:** USB-C
- **Keyboard backlighting colour support:** RGB
- **Keyboard description:** Gaming
- **Product dimensions:** 29.1L x 10.1W x 3.9H centimetres
- **Recommended uses for product:** Gaming
- **Special feature:** Backlit, Ergonomic
- **Style:** Blue Switch

## Images

![Cosmic Byte CB-GK-21 Themis 61 Key Mechanical Per Key RGB Gaming Keyboard with Outemu Blue Switches and Software (Black) - Image 1](https://m.media-amazon.com/images/I/71utzsmU6qL.jpg)
![Cosmic Byte CB-GK-21 Themis 61 Key Mechanical Per Key RGB Gaming Keyboard with Outemu Blue Switches and Software (Black) - Image 2](https://m.media-amazon.com/images/I/619idtF4wjL.jpg)
![Cosmic Byte CB-GK-21 Themis 61 Key Mechanical Per Key RGB Gaming Keyboard with Outemu Blue Switches and Software (Black) - Image 3](https://m.media-amazon.com/images/I/61vGIWKviZL.jpg)
![Cosmic Byte CB-GK-21 Themis 61 Key Mechanical Per Key RGB Gaming Keyboard with Outemu Blue Switches and Software (Black) - Image 4](https://m.media-amazon.com/images/I/610t8-oETRL.jpg)
![Cosmic Byte CB-GK-21 Themis 61 Key Mechanical Per Key RGB Gaming Keyboard with Outemu Blue Switches and Software (Black) - Image 5](https://m.media-amazon.com/images/I/61NjwX9tGVL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ One of the best Mechanical Blue Switch Keyboards in its price segment.
*by S***H on 12 June 2024*

The positive's of this are: 1. The keys are tactile and responsive 2. Its very easy to clean 3. It feels quite durable. 4. Blue keys with very good sound. (Are very loud if use near to roommate/parents💀) 5. 10KL means less space, perfect for me in my gaming setup. My laptop already has all the other keys I would need. The negative points are: 1. There are no (flip) legs. 2. The keys are tightly secured to the keycaps and are somewhat difficult to remove if you don't have the correct tool and technique. 3. The backlight only shows up on the keys/numbers. The alternate key function (F1, F2, F3, etc) are printed with grey/white color, so unless you got direct light on the keyboard, they wont be visible with the backlight. 4. Little hard to find the shortcuts in the first few months, especially if you already had habit from another keyboard. If you get this KB for Rs 2300 or less, go for it. Its a good 10 keyless keyboard for gaming. If you are programmer or often use the keypad, then this is a poor choice of mechanical keyboard.

### ⭐⭐⭐⭐⭐ Best budget 60% keyboard!
*by A***L on 20 March 2022*

The review will be straightforward. I am using it for the past few months daily for gaming and coding mostly. I purchased the keyboard for Rs. 2,060 on Amazon. Delivery was on time but the package I recieved was tampered with, missing the UBS c cable and key cap puller. So I had to replace the product. Anyway received a good one later on. the keyboard shortcuts are inbuilt. fn+q = vol down fn+w = vol up fn+e = mute fn+z = previous/rewind fn+x = play pause fn+c = next/forward fn+v = stop fn+h = insert fn+b = delete fn+j = home fn+n = end fn+k = pageup fn+m = pagedown fn+i = scroll lock fn+o = numlock (don't know why even xD) fn+esc = `(tilde Here are the pros and cons of the keyboard. Pros. Compact. Doesn't take up much space on my table. Build quality is good enough for the price. Mechanical switches are blue outemu. Great sound. Braided cable is long enough. RGB with diffuser plate looks superb and bright with actual RGB controls not static row colors. All keys are anti ghosting. Tested myself. Cons. No height adjustable leverage on the back. No drainage hole beneath the keyboard. The spacebar kind of gives way after rough use. Double clicks sometimes but it's okay. Arrow keys are on the function key. So you have to press fn to use the arrow keys. The usb c port on the keyboard is a bit loose for my liking. Could have been in the frame or something. Overall best bang for buck budget 60% keyboard.

### ⭐⭐⭐⭐ Worth its price
*by S***A on 31 August 2024*

I am writing this review after 2 year and 4 month of constant use. The plastic quality is decently nice and the wire quality is fabulous. The keyboard worked really good till 2 years in terms of literally everything. But from past 2.5 months approximately, i am facing issue with the keystrokes. The keyboard randomly types the letter more than one or twice especially during fast typing. From my experience i can surely say its due to the quality of mechanical switches used and not a software or driver problem. But overall great experience !!!

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- Cosmic Byte CB-GK-21 Themis 61 Key Mechanical Per Key RGB Gaming Keyboard with Outemu Blue Switches and Software (Black)
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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-07-20*