The SLXD4 Receiver is the choice for confident presentation and performance - from lecture halls to live entertainment. SLX-D Digital Wireless delivers transparent, 24-bit digital audio and rock solid RF performance with easy setup and rechargeability options in a suite of versatile wireless system configurations. Featuring industry-leading digital wireless technology and design, the SLXD4 easily syncs wireless transmitters. A variety of interchangeable microphone choices guarantees the right solution for a wide range of applications, from day-long presentations to nighttime performances. Features Transparent 24-bit digital audio Extended 20 Hz to 20 kHz frequency range (microphone dependent) 118 dB dynamic range Digital predictive switching diversity 44 MHz tuning bandwidth (region dependent) 32 available channels per frequency band (region dependent) Up to 10 compatible systems per 6MHz TV band; 12 systems per 8 MHz band Easy pairing of transmitters and receivers over IR scan and sync Up to 8 hours from 2 AA batteries or optional Shure SB903 rechargeable battery Interchangeable microphone capsules Rugged metal construction