The SLXD14/153B Wireless System delivers transparent, 24-bit digital audio and rock-solid RF performance for a wide range of applications, from day-long presentations to nighttime performances. Operate up to 32 compatible systems per 44 MHz band, with easy setup and optional rechargeability accessories for wireless excellence, wherever required. Ships with SLXD4 single-channel receiver, SLXD1 bodypack transmitters and MX153B Omnidirectional Earset Headworn Microphone with protective pouch, 3 windscreens, collar clip, antenna, rackmount accessories and 2 AA batteries.