Featuring the DL4 IP57-rated waterproof subminiature lavalier microphone (black) and the SLXD1 transmitter to provides transparent digital audio and rock-solid RF stability for lecture halls and live performances.The SLXD14/DL4 Digital 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 transmitter and DL4 IP57-rated waterproof subminiature omnidirectional lavalier microphone (black) with lavalier, antenna and rackmount accessories, and 2 AA batteries.