Mars car charger 3USB WP-C01 - With IC Self-charging technology and quality stability, charging is quick without damaging the device. 3 USB Output / 4.2A Smart-Bypass / Based on the current of charging devices, Martian will use Smart- Bypass to charge without damaging your devices. Supports large number of devices . Charge dashboard cameras, speakers, Bluetooth headphones, smartphones, tablets and GPS navigation tools.