This kit includes 1 small lavalier (lapel) microphone and 1 wireless transmitter and 1 receiver. Also included is a transmitter made for plugging directly into the bottom of a handheld microphone (the microphone itself is NOT included). The lapel-microphone transmitter is easily clipped onto a wearer's belt or pocket, and receiver includes a hot-shoe mount for high-end video cameras. An alternative to the Audio-Technica Wireless Microphone system also available. Requires 4 AA batteries per kit.