Model Number: DC-004 Key Specifications/Special Features: Input: DC 5V 2AOutput: DC 4.2V 800mASize: 45*60.3*20(mm)Weight: about 26gFeatures:1) 100% brand new non-OEM chargerThis dual charger perfect for GoPro HERO4 camera BT-401 battery2) This rapid battery charger with DC 4.2V 800mA outputIt can fully charge a battery within a couple hoursSlim and portable design for easy storage and take to anywhere3) Micro and mini dual USB input, micro USB port works world-wide on DC 5V power input, use for such as USB AC adapter, car charger or computer USB outletConvenient to use in any place4) Dual charger can charge for 1-2PCS 3.7V BT-401 lithium-ion batteries at once5) LED indication for power on / charging / full charge