What type of leads come with the unit, i. e. alligator/pin probe?

Jack, if you wanted to use pin probes they would attach to the alligator clips. The leads on the unit are about 20" long anyway.

I work on old Amps, can it test 350 volt & 450 volt capacitors.this question is pertaining to the Atlas ESR 70

As others have mentioned, it can test those capacitors if they are in their discharged state.The manufacturers specs say - it can auto discharge up to +/- 50v and for a cap that is less than 10uF the absolute maximum it can withstand is +/- 275v, over 10uF that is +/- 50v

Can this unit be used to test capacitors in circuit (without unsoldering)?

Atlas ESR can be used in the circuit. For this reason, also be measured without removing the capacitor from the substrate. Of course, even if you test a capacitor is removed from the circuit, can be measured.

so it only checks capacitance of .1uf or higher?

Its capacitance measurement range is 1uF to 22,000uF with 0.2uF accuracy.

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⚡ Diagnose Like a Pro, Stay Ahead of the Curve!

COMPACT POWERHOUSE - Lightweight, battery-powered design means ultimate portability for on-the-go professionals.
SAFE SOUND TESTING - Built-in protection against highly charged capacitors keeps you and your device safe.
DYNAMIC RANGE MASTERY - Enhanced 0.00 to 40.0 ohms range covers all your testing needs without compromise.
PRECISION AT YOUR FINGERTIPS - Measure ESR and capacitance in-circuit with ultra-fine resolution for flawless diagnostics.
INSTANT ALERTS ZERO GUESSWORK - Audible notifications for different ESR levels ensure you never miss a critical reading.

The VellemanAtlas ESR70 is a compact, battery-powered ESR and capacitance meter offering an impressive 0.00 to 40.0 ohms dynamic range and 0.01 ohms resolution. Designed for in-circuit testing, it features protection against highly charged capacitors and audible alerts for quick, accurate diagnostics—perfect for professionals demanding precision and safety.

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Manufacturer	Velleman
Part number	166225
Item Weight	96 g
Product Dimensions	0.1 x 0.1 x 0.1 cm; 96 g
Batteries	1 12V batteries required. (included)
Item model number	ESR70
Color	Purple
Style	Modern
Power source type	Battery Powered
Item Package Quantity	1
Number Of Pieces	1
Batteries Included?	Yes
Batteries Required?	No

Velleman Atlas ESR70

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