High conversion efficiency     Output constant voltage and current adjustable.     There is output over-current protection indicator.     There is an output indicator.     High reliability and stable operation.          Main parameters:     1. Product Name: high power DC step-down module power supply.     2. Input voltage: dc7v-50v.     2. Input current: 20A max.     4. Output voltage: 0v-36v adjustable.     5. Output power: 800W max.     6. Conversion efficiency: 93-95% (efficiency is related to input and output voltage and current).     7. Working temperature: - 20℃ ~ 60℃.     Main uses:     1. High power solar street lamp drive.     2. All kinds of LED lighting constant current drive.     3. Power supply for vehicle and various mobile devices.     4. DIY adjustable constant voltage and current power supply.     5. Solar charging power supply.     6. Charge various batteries.     colour: green     Material: metal + PC          Package Contents:     1 x Dc Step-Down Power Supply Module          Only the above package content, other products are not included.     Note: Light shooting 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.