Input: DC 12~24V; Output: DC 5V 1A / 2.1A; Smooth appearance, fashion and lightweight; Standard USB voltage output, auto identification and protection of over-load, short circuit; Dedicated car charging IC design, stable working and high efficiency; Independent anti-electromagnet interference for circuit, will not affect normal use of devices; Dual-USB output design, supports charging two devices at the same time; Flame resistant materials housing, safe and high performance.