Application--It suitable for electric bicycles, scooter, etc. Premium Material--It made of high quality material, this brushless controller is sturdy and durable. Sensitive Control--This item is a brushless motor controller, it can provide steady speed and sensitive control of and direction changes. High Performance--The wires and interfaces are durable, and low malfunction of long time use. Rated Power:500W Rated current: Current limit 31A plus or minus 1A Suitable Motor Phrase Angle: 60 / 120 degree colour:Silver Material:Aluminum alloy size:15 x 8 x 4cm Package Contents: 1 x 48V 500W Brushless Controller Only the above package content, other products are not included. Note: Light 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.