1Built-in protection for short circuit, overload protection, overheat protection, low voltage and over voltage protection, keep your devices and car safe. 2LCD screen, high definition, making it easy for viewing voltage conditions. 3AC outlets and USB charging ports ideal for powering smartphones, laptop, tablets, camping equipment and mobile office equipment, charge your multiple electronic devices anytime and anywhere. 4Built-in cooling fan, which has good heat dissipation effect, extend the service life and safer for using. 5Small size, lightweight and portable, has lower noise and no pollution. 6The inverter can convert DC 12/24V to AC 220V, which is a practical accessory.