12V is usually for cars Support 4 USB interfaces to work at the same time, easily meet the power needs of various vehicle electrical devices. Available voltage range of electrical appliances: 200~240VInverter input voltage safety range: 12V (9.8~15V) Specification: : Car Inverter Input voltage: DC 10.5V~15V, (when the battery voltage is less than 10.5V, the inverter is low voltage protection, when the battery voltage is higher than 15V, the inverter high voltage protection) Output voltage: 220 V AC The output frequency is: 50 Hz for the 220 V model Maximum power: 4000 W Rated power: 300 W Output waveform: Modified sine wave Colour: blue. Material: plastic. Package contents:1 x Inverter 2 x battery1 x cigarette lighter socket.1 x English manual..You'an store products