Color: Black
Input voltage: DC 5V 0.5-2A
Output voltage: DC 4.2V 300mA.
Input plug: USB male
Output plug: outer diameter 2.0mm round plug
Rechargeable battery: 3.7V lithium battery 50-600mAH
Charging indication: built-in two-color charging indicator, USB charging cable connected to the power supply green light, plug in the battery to charge on the red light, when the lithium battery is fully charged, green light.
Package contains: 2pcs USB lithium battery charging cable.