Item Type: 18650 Battery Holder Box with POwer Plug 
Material: Plastic + Metal
Color: Black
Type:  2 Slot, 3 Slot, 4 Slot (Optional) Please choose which one is required.
DC Plug: 5.5x2.1mm
Fit for 18650 3.7V Battery 

Package includes:
1 X 18650 Battery Box Holder (Batteries are not included.)