Kisae Sine Wave Inverter/Charger - 1,000 Watts, 40 Amp Multi-Stage Charger, Model# IC121040 Detachable digital display panel allows you to view system information from anywhere in your RV or boat Includes 2 GFCI outlets and knockouts for AC hardwire installation &#160;Includes built-in USB port for recharging a phone, iPod or other electronic device Automatic AC load sensing prevents tripping of the shore power breaker Overload and over-temperature protection and low battery shutdown offer safety