Feature: 1. Anti Drop: The aluminum alloy housing provides advanced protection against drops and bumps, is sturdy and wear resistant, and has a long service life. 2. Good Heat Dissipation: Aluminum alloy casing and high speed intelligent cooling fans help reduce heat, and integrated cooling fans help reduce heat (note: when the inverter is working, it is normal for the metal casing to heat up, the inverter uses built in fans and metal shell heat dissipation). 3. Overload Protection: LED red light on, lock, buzzer alarm, DC AC priority auto switch to main, switch indicator light, auto resume auto switch to inverter. 4. Under and Over Voltage Protection: LED red light is on, automatic recovery, buzzer alarm, DC AC priority automatically switches to power supply, switch indicator light automatically recovers and automatically switches to inverter power supply, switch indicator light. 5. Output 220V: Suitable for most 220V terminal equipment, cars, RVs, boats, yachts, solar panels, small power tools (pumps, vacuums, drills, chainsaws), heaters, water heaters, coffee machines, fans, refrigerators, DVDs , PC, mobile phone, etc. Specification: Item Type: Pure Sine Wave Inverter Material: Aluminum Alloy Gross Weight: 1727g / 60.9oz Product Size: Approx.22.7 x 14.6 x 6.7cm / 8.9 x 5.7 x 2.6in Output Voltage: 220V Power: 500W Cooling: Smart air cooling (fans start over 45 degrees). Package List: 1 x Inverter2 x RV Line2 x Insert Car Fuse Note: 1. Avoid electric shock and keep away from children The inverter outputs pure DC AC power, the AC power socket has high AC current, which is similar to the common household AC socket, and has potential hazards. Please stay away and do not touch, as this can lead to serious consequences or death. Keep away from children and people with intellectual disabilities, which may cause danger 2. Keep away from inflammable and explosive materials Do not use the inverter in places with flammable and explosive gases, such as gasoline hulls or propane tanks 3. High voltage danger, do not remove or touch at will 4. Do not connect wires randomly This series of inverters is used in off grid solar energy systems. The CND line of the inverter and the electronic equipment should be connected to the ground. The AC output neutral line should not be regarded as a GND line. AC inverters are not allowed to connect to the power grid. (For example: home 220V AC line)