Listen Technologies LP-51-072-01 - Advanced Intelligent DSP RF Receiver 12-Pack (72 MHz)Ideal for upgrading an existing system or making assistive listening available to a larger audience, the LP 51 072 01 Advanced Intelligent DSP RF Receiver 12 Pack includes everything needed for conferences, classrooms, or large venues. Each pack includes twelve (12) of our LR 5200 072 RF receiversthe industry leading, multi channel digital receiver featuring a compact design, best in class pickup, and reduced noise. The built in rechargeable battery