[Good heat dissipation]: the surface part of the brushless regulator is designed with aluminium alloy; due to the good heat dissipation function, the brushless regulator can protect the internal circuit and avoid thermal overload Easy to use]:The brushless motor electric speed regulator interface has an instruction label, so you can install it according to the instruction label; 36V / 48V 250W brushless speed models are suitable for electric bicycles, , etc. Sensitive control]: The speed control motor controller provides stable speed, sensitive control of and direction changes High performance]: The brushless motor controller has wires and connections to less breakdowns in long-term use Color: Silver Material: aluminium alloy Package Contents: 1 x Brushless 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.