The USINA power supply was created with the main goal of powering the car's sound system without letting its batteries discharge, even with the music playing for several hours. It can also be used as a direct power source (without using batteries), powering CD players, power modules, etc. TECHNICAL SPECIFICATIONS: Input Voltage: Automatic Dual Voltage AC 127V: 100 @ 140V AC 220V: 170 @ 250V 127V Consumption: 32A (maximum) 220V Consumption: 22A (maximum) Output Voltage: 12.5V @ 14.4V DC (+-1%) Output Current: 220A @ 12.5V DC (+-10%)* Output Power: 2750 Watts (maximum)** Efficiency: 85% Input Power: 3450 Watts (maximum) Input Cable: 3x2.5mm - 2P+T Input Protection: 32A Circuit Breaker Output Cable: 50mm Recommended Extension: 4mm (max 30 meters) Weight: 4Kg Approximate Dimensions (HxWxL): 8.6cmx18.6cmx37.6cm*** NOTES: *Current and power measured under resistive load **Output power may vary depending on grid voltage and usage conditions ***Dimensions measurements have an approximate 2mm variation