The 2000BT body-pack transmitter is made to work perfectly in conjunction with the 2000 Series receivers. It is housed in a durable die-cast metal case and includes a single, flexible, detachable antenna, a transmitter holster and a steel belt clip for durable, reliable hands-free operation. It has a clear LCD display with user-friendly controls for pairing its group and channel numbers to your 2000 Series receiver. It is powered by 2 “AA” batteries and can last up to 8 hours in the field. It features a locking 4-pin Hirose microphone input that is compatible with many AZDEN headset and lapel microphones.