Features1. Constant current and constant voltage protection2. Battery heat management3. Trickle charging4. Can charge two batteries simultaneously5. 2 socket charging，Micro USB line charging6. Red when charging， green full chargingSpecification:General Model SG149Type Battery ChargerMaterial PlasticCompatible SJCAM SJ400 etcOutput Power DC 4.2V / 750mA (x2)Size 48*38*11mmWeight 48gPackage weight One package Weight 0.06kgs / 0.13lbOne Package Size 9.5cm * 5.0cm * 5.0cm / 3.74inch * 1.97inch * 1.97inchQty per Carton 100Carton Weight 7.4kgs / 16.31lbCarton Size 40cm * 32cm * 24cm / 15.75inch * 12.6inch * 9.45inch1X USB Dual Charger2X SJCAM 900mAh Battery1X USB Charging Cable