The Samson Concert 88a is a UHF wireless receiver module designed to slot into the Expedition XP310w or XP312w rechargeable portable PA. It supports up to 100 frequency channels, infrared sync to align transmitter and receiver frequencies, and a tone key to suppress noise when a transmitter is out of range. The module accepts Concert 88 handheld, headset, and lavalier transmitters and provides a reliable 100 ft line-of-sight range.