This is a 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.