Model: -BW3X2 Name: Battery Holder Battery box holder with pin connector, suitable for 18650 batteries. With the soldering leg, you can easily put the battery in. With a cap and an on/off button : Serial connection Suitable for: 2x18650 3.7V Battery (not included) Rated voltage: DC 7.4V Size: 8.8 x 4.1 x 2.2cm (LxWxH) Length: 16cm Material: Plastic Color: Black Package Included: 10 x Battery Box Holder (Batteries are not included.) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.