Accurate battery status: Built-in LED display with five capacity bars shows remaining battery clearly and flashes when recharge is needed, so you can monitor DC12V supply at a glance. Reliable DC-to-AC conversion: Converts 12V DC to 220V AC and delivers up to 4000W of stable output, providing sufficient power for laptops, phones, small appliances and other electronics. Multiple output options: One 220V AC socket plus two USB ports allow simultaneous charging of a laptop and mobile devices or multiple USB-powered accessories from a single 12V source. Comprehensive safety protection: Integrated safeguards against overload, overvoltage, overheating and short circuits protect both the inverter and connected devices for safer operation. Practical design for on-the-go and home use: Built to support a range of applications where 12V vehicle or battery power must be converted to household voltage; compact and road-ready for travel or emergency use (size and installation depend on model). Compatibility and performance: Works with any standard 12V supply and supports common consumer electronics and many household items within the inverter’s power rating. Use scenarios Road trips and camping: Power a laptop, charge phones and run small appliances in a camper or car while monitoring battery level to avoid unexpected shutdowns. Home emergency backup: Keep essential devices running during a power outage—charge communication devices, run lights or small appliances using a 12V battery bank. Field work and job sites: Provide AC power and USB charging for tools, laptops and measurement devices where mains power is unavailable. What it solves Eliminates dependence on mains power by converting 12V DC to 220V AC with visible battery status. Prevents damage to connected equipment with multi-layer safety protections. Reduces the need for multiple chargers by offering both AC and USB outputs at once. Specifications (as provided) Input: DC 12V Output: AC 220V Rated power: 4000W (stable converted output) Outputs: 1 AC socket, 2 USB ports Indicators: Built-in LED screen with 5-level battery capacity bars (flashes when recharge is needed) Protections: Overload, overvoltage, overheating, short circuit Notes Ensure connected loads do not exceed the inverter’s rated power. Follow manufacturer instructions for safe installation and ventilation.