SwitchBotDoor Alarm Contact Sensor - Smart Home Security Wireless Window Alarm and Door Sensor, Add SwitchBot Hub to Make it Compatible with Alexa

This is a great contact sensor. It is very easy to install and setup. I do have the SwitchBot Hub 2 (a hub is required (hub mini/hub 2) for a lot of the features to work) which detected the contact sensors right away.I installed them on my garage doors and side door of the garage in case I forget to close them. Also installed one in the utility room which has a string to pull in order to turn on/off the light, so I added a smart bulb and made an automation to turn on or off the light when the door is open or closed. It works instantly every time! If you use an automation and don't want to receive notifications each time the door opens or closes, you can turn them off in the app which I did for the one in the utility room.Instead of using the 3M double sided tape I used Command strips which makes it easier to remove the sensor when I will need to change the battery or want to use it at a different door or window.So far I have 5 contact sensors and all work great for me. Love them and the price is great!Definitely recommend this contact sensor.

This is a great little gadget from Switchbot. It is easy to install, and instantly detects a closed or open door. This works perfectly within the switchbot app and was very quickly recognized and set up.I installed this on my front door at the top, and it was incredibly easy. Just peel off the 3M tape, and stick it. and then it's installed. now i can use the contact sensor within the Alexa app using a routine to tie it into other home automation programs!Using this, it's pretty easy to program your lights/gadgets within your house to detect when you leave/enter your home and automatically greet you or turn your lights on!I can't wait to see the next set of Switchbot products!

I have this sensor mounted on an exterior door. Usually when the door is opened, I get a notification on my Android phone (Pixel 7) almost immediately (95% of the time). However there are times where notifications can take up to 10 minutes, and I'm not exactly sure why. This could be an issue with my phone and completely unrelated to this device - not sure. Othewise, as with other Switchbot products, it was easy to setup and install. Overall I'm pleased and would buy it again.

Contact sensors are great. I have them installed on my garage fridge and freezer. Alerts are pretty much instant. I’m using them with HomeKit and the Switchbot app which is great. The Switchbot app is great since it gives you an option to get notified if the door has been left open for a set amount of time. For some reason, Apple Home app doesn’t allow for that type of notification or shortcut at the moment. Hopefully Apple will address it in the future. Notifications on bought apps are instant.

Disappointed, angry, and frustrated about this purchase and the app. The toll free hot line is disconnected. Company should be ashamed of themselves. I received better technical devices on Temu for a forth of the price compared to the this brand. You can only use about 15% when you download the app for this device for the setting. If you don't have the Switchbot Hub the remaining 85% is a complete waste of space.I could not set my phone to receive notifications or alerts if someone open my apartment door especially when I'm I will be notified. . And I'm still wondering what the Fresnel lens because the manual does not explain it they give you another QR code for more information.However, it does tell you how to connect with Amazon Alexa device but the device is practically useless and could have brought a indoor camera for for a few extra bucks more for what I paid for. Don't Used this for Security It's Completely Unsafe!!!

You have to go into the app to find contact usage. My old contact sensor would notify me straight to alerts on my phone. The worst part is that you can't turn off motion notification without also disabling contact sensing notifications, but it works seamlessly with alexa as long as you have a hub.

Works great!!

My SwitchBot experience is fantastic, i am really enjoying all the products i have.Especially the contact sensor. 3 sensors in one device, ambient light sensor, open/close sensor and motion sensor. This enables a great range for automation. The only product that works well in the bathroom without any random turn offs. Really a great product.