Features Over current protection.Connect automatically after cooling. Connect automatically after cooling. Input Voltage: DC 1.8 V-15 V.Current: less than 2 A. Over current protection. Potentiometer has no switch function. Specifications:Input Voltage: DC 1.8 V-15 V Current: Less than 2 ASize: 32 x 32 x 14 mm Package includes: 1 x Speed Controller Note:1, Potentiometer has no switch function.2, Connect to DC power. Never connect to 220 V AC power.3, Please allow 1-3 mm error due to manual measurement. Thanks for your understanding. 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.5, Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List