Features: _x000D_ 1, Over current protection. _x000D_ 2, Connect automatically after cooling. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Input Voltage: DC 1.8 V-15 V _x000D_ Current: Less than 2 A _x000D_ Size: 32 x 32 x 14 mm _x000D_ _x000D_ _x000D_ Package includes:_x000D_ 1 x Speed Controller_x000D_ _x000D_ _x000D_ _x000D_ Note: _x000D_ 1, Potentiometer has no switch function. _x000D_ 2, Connect to DC power. Never connect to 220 V AC power. _x000D_ 3, Please allow 1-3 mm error due to manual measurement. Thanks for your understanding._x000D_ 4, Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard._x000D_ 5, Please note that the type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 1Over current protection 2Connect automatically after cooling 3Input Voltage: DC 1.8 V-15 V 4Current: less than 2 A 5Potentiometer has no switch function