Usage Tips:DC Motor Speed Controller Applicable voltage range: DC 7-70V Drive current: max. 30A (If the operating voltage is high, then the operating current needs to be reduced. Please use it refer to the power, which better protect the motor and the Controller.) Control power (recommended): 12V: within 300W 24V: within 400W 48V: within 450W 60V: within 500W Duty cycle adjustable range:about 1%-100% PWM frequency:12KHZ Shell size:85mmx58mmx32mm Fuse: Current:30A max Wire diameter:2.5MM/0.4cm diameter/12AWG Length of wire:26cm (total length including seat 30cm) Note:The product appearance may be slightly different due to different factory batches, which not affect the use of the product. Please be careful when purchasing if you mind. Colour:Silver Material:Metal Package Contents: 1 * PWM DC Motor Speed Controller 1 * 30A Fuse 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.