Have you ever gotten any annoyance about insufficient power supply for timely shooting in the car? Why not choose our JUSTONE J071 3-in-1 USB Multifunction Dual Slot Smart Charger + 2 x Batteries for GoPro Hero 3/3 + for standby purpose? The dual slot charger pack allows you to charge two batteries at the same time efficiently. Applicable for GoPro Hero 3/3 +，the setmakes it a breeze to keep your device working continuously and smoothly without any doubt. A perfect pack for on-the-go use!                                    Features             Guarantee secure and timely power supply<br> Compact， little space-occupied， portable and lightweight， will not affect the beauty of your stylish car<br> Support charging for your treasured GoPro Hero 3/3 +<br> A safe and quick way for standby application and emergency<br> Bring you efficient charging in the car <br>                                                            Specifications             Brand     JUSTONE    <br> Model     J071    <br> Color     Black    <br> Material     Plastic    <br> Quantity     1Set    <br> Compatible Brand     Gopro Hero     <br> Compatible Models     Gopro Hero 3/3+    <br> Compatible Battery Model     AHDBT-302 / AHDBT-301/ AHDBT-201     <br> Output Current     800mA    <br> Input Voltage     5V     <br> Output Voltage     4.2V    <br> Dimensions     (2.05 x 1.64 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 Charger<br>1 x Data Cable (80cm)<br>2 x Batteries (1300mAh)<br>