Quickly test whether the brushless motor coil is good or bad Quickly test whether the brushless controller good or bad Quickly test whether the the brushless motor phase sequence is ABC and abc colors Quickly test whether the the phase angle is 60 degrees or 120 degrees Quickly test whether the brushless motor Hall's good or bad Name: Electric car Scooter Brushless Controller Tester Applicable Machine: 24V/36V/48V/60V / 72V Working Temperature: -20Celsius-50Celsius Relative temperature less than equal 80Celsius colour:White Material:plastic size:10.5 x 7.5cm Package Contents: 4 x Brushless motor tester 4 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.