Fangrui Product Details 1. High Performance, Continuously Adjustable Output Voltage And Current 2. Add Digital Display Function For More Convenient Use 3. Easy To Operate, Ready To Use When Connected To 4. Made Of High-quality Materials, With An Input Voltage Of Up To 90v 5. Extremely Efficient, Up To Input Voltage:dc25-90v (cannot Be Used For 84v Batteries) Output Voltage:2.5v-50v Adjustable (can Only Be Reduced) (maximum Output Voltage=input Voltage * 0.8) Output Current:50a (max), Long-term Operation Within 30a Maximum Power:1000w (for Use With Electric Tools Within 1000w) Conversion Efficiency: Equal Protection:overcurrent Protection 60a Working Temperature:-4085storage Environment:-20+50relative Humidity:65 Wiring:in High-power Situations, The Wiring Should Be As Thick As Possible. Interface Description: In+:input Positive Pole In -:input Negative Pole Out+:output Positive Pole Out -:output Negative Pole Attention:to Charge The Battery And Battery, Please Add A Diode To The Output To Prevent Bac