Combination 2400mA USB charger and 3-LED battery monitor; with vehicle battery protection. - Vehicle battery protection: USB output turns off 3 hours after engine stopped or when vehicle battery charge level is less than 50% - 3 LED battery monitor (when USB output off) - battery status is displayed every 5 seconds - 12V input through an industry standard SAE 2-pin connector - 5V 2400mA true output - Unique seal and cap design for USB socket; use any USB cable; seals when inserted - Short circuit; overheat; over-voltage protection
