Features: 2. Built-in multiple protection including overvoltage, overcurrent, overheat and short circuit protection. 3. The internal circuit board adopts precision SMT workmanship, waterproof, dustproof and anti-shock. 4. The module shell is made of flame-retardant silicone, little heat production during use. 5. Suitable for car LED screen, monitor camera, fan, water pump, motor, router and other 5V electrical devices. Specification: Model: GYVRM-K480508 Type: DC-DC Non-isolated Step Down Module Output current: 8A Output power: 40W Conversion efficiency: 96% Mounting hole: 4mm Dimensions: 75*40*22mm / 2.95*1.57*0.87in Weight: Approx. 97g/3.4oz Package l ist: 1 * Buck Converter Note : 1. Due to the difference between monitors and light effects, the pictures may not reflect the actual color of the item. 2. Please allow slight error due to manual measurement. Thanks for your understanding.