As the latest smart and quick charging device for travel use， our JUSTONE J059 3-in-1 USB Multifunction Dual Slot Smart Charger for GoPro Hero 3/3 + must be badly needed by those wise consumers pursuing efficient and timely power supply to keep shooting going smoothly. It is characterized by the intelligent fast charging chip with comprehensive over-voltage/overshoot/short circuit protection and constant current/voltage protection. By applying this smart charger， you are allowed to charge two batteries simultaneously. Additionally， you can obtain trickle charging and automatic recharging. Wise try!                                    Features             Intelligent fast charging chip， with comprehensive over-voltage/overshoot/short circuit protection， constant current/voltage protection<br> Unique multi-channel compatible input<br> Two batteries can be charged at the same time<br> High charging speed and efficiency， your best choice for the journey<br> Battery heat management<br> Trickle charging and automatic recharging <br>                                                            Specifications             Brand     JUSTONE     <br> Model     J059     <br> Color     Black     <br> Material     ABS     <br> Quantity     1Piece     <br> Compatible Models     GoPro Hero 3 ， GoPro Hero 3+     <br> Output Current     800mA     <br> Output Voltage     4.2V     <br> Input Current     2A     <br> Power Adapter     Without Power Adapter     <br> Input Voltage     5V     <br> Dimensions     (2.05 x 1.65 x 0.47)" / (5.2 x 4.2 x 1.2)cm (L x W x H)     <br> Weight     0.71oz / 20g       <br>                                                             Package Includes            1 x Battery Charger<br>1 x Cable (80cm)<br>