7 80V PWM DC Motor Speed Controller Switch 30A,Motor Speed Control Regulator auspowers_batchthree for two years from the inculd screw and tool for two years from the date of purchase Features of insert nut: These threaded inserts are inserted into a pre drilled hole by screwing in (operating voltage relatively high current must be reduced with power use) Control power: Jianyi 12V 300W within 24V 400W 48V 450W within 72V 500W Duty cycle adjustable range: about 1% 100% PWM frequency: 12KHZ Shell Size: 85MM59mm34MM Adjust Potentiometer Hole 8MM Button Projection Height 16MM Weight: 145g 12 Month Warranty，We value your shopping experience and strive to offer a high quality product and service The standard aluminum housing protects the internal circuits and components for long term durability