Use jst plug for smaller footprint. The power supply box uses 4 AA batteries and provides 6V voltage. It can be used for powering the receiver. Or it can be used as the power switch of RC boat / aircraft. It can also be used as the power supply of RC lights. It can meet your DIY needs. Specifications: Name: Battery Box, Material: Plastic, Dimensions: 2.24*1.18*1.18in/5.7*3.0*3.0cm, Color: Black, Compatible with: 1:10 and 1:8 vehicles! Package Included: 1x Battery Box