This is a momentary tactile switch. This means that the switch will only work when it is physically held down. Once pressure is released, the switch will disconnect and the action will stop.

This is a female socket connector. It covers high quality polyethylene material. The 4mm female socket is used to mount on the board to make an audio connection, wire connection, etc.

This is a hard plastic build battery holder case. This case has the capacity to hold two 18650 3.7V batteries. The case is designed with high precision and accuracy which helps you with easy installation and removal of batteries. The material that is used to make the case is hard plastic. It can withstand high room temperature.