1. Quickly Detect The Quality Of The Brushless Motor And The Motor Hall Phase Sequence. 2. Quickly Detect Whether The Phase Angle Between The Motor And The Controller is 60 Or 120. 3. Quickly Detect The Quality Of The Controller. 4. Quick Wiring Of Brushless Motor And Controller (36 Connection Methods) 5. Quickly Detect The Quality Of The Rotary Brake Lever. Detection Function: 1. Motor, Controller, Rotary Brake Lever, Phase Angle, Winding, Hall With English Instructions 2. With Self-Test Function (Whether The Car Repair Tool Is Faulty) 3. Plug The Bao Hall Plugs Together, Turn On The Power, The Power Indicator Light/Controller 5v Power Indicator Light Is On, And The Ha/Hb/ Light Flashes In A Cycle, Indicating That The Bao Is Not Faulty, Otherwise There Is A Fault. This Function Is Convenient For People To Quickly Confirm Whether The Car Repair Tool Is Faulty. Power Supply Voltage:9v Button Battery Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:As Shown Material:ABS Size:About 115x80x26mm Package Contents: 1 * Motor Hall Controller Detector 1 * 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.