Looking to add another frequency-agile UHF wireless system to your Expedition XP310w or XP312w Rechargeable Portable PA? The Concert 88a Series features Concert 88 Series wireless transmitters and the unique CR88a Receiver Module, which is specifically designed to slide/lock into the back panel of your XP310w or XP312w. Features: Frequency-agile UHF wireless system CR88a Receiver Module designed specifically for use with Samson Expedition XP310w and XP312w Rechargeable Portable PAs Up to 100 available operating channels IR sync wirelessly matches receiver and transmitter frequency Tone key prevents unwanted noise when transmitter is off/out of range Lavalier: CB88 Beltpack Transmitter with DE5 Headset Microphone Multifunctional backlit LCD Transmitter offers up to eight hours of battery life using two AA batteries 100' operating range (line-of-sight) Get your Samson Concert 88a Lavalier Wireless System (D Band) today at the guaranteed lowest price from Sam Ash with our 45-day return and 60-day price protection policy.