This kv/rpm meter has some unique features, including a potentiometer meaning you dont need a radio or servo adjuster to control and set motor speed. There is also a unique feature that allows you to test 1s~12s powered brushless motors, so there is almost no limit to the motor size this great little tool can handle. The K2 has a max reading function which is handy for recalling data & comes with a lead complete with croc clips so no soldering is required, an indispensable tool for hobbyists using electric power.

Specs:
Screen: LCD
Working Temp: -20C ~ 50C
Weight: 21g
Dimensions: 33mm x 69mm x 11mm
Working Voltage Range: 5.5v~42v 
Measuring Voltage: 0v~42v