Quickly test whether the brushless motor coil / brushless controller / brushless motor hall is 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. Applicable Machine:24V/36V/48V/60V/72V Power:9V battery (included) Product Name:Electric Car Scooter Brushless Controller Tester Working Temperature:-20C-50C Relative temperature less than equal 80c Colour:White Material:Plastic Size:10.5x7.5x2.5cm Package Contents: 1 * Brushless Motor Controller 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.