Usage Tips:Adopts ABS flame-retardant housing, wear resistance and can provide long service time. The governor starts slowly and has a soft-start function. 400W high power can provides stable performance. Corotation and reverse adjustable, easy to adjust according to your demands. One button to on/off the motor, and please disconnect the powersupply when it is necessary to stop the operation for a long time. Specifications: Name: Speed Controller Model: US-52 Power: 400W Colour: Dark Green Material:ABS Due to different batches, there may be differences in product appearance and printed text, which will not affect use Package Contents: 1 x Motor Speed 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.