Wireless Digital Transmitter Handheld SLXD2/SM58 Frequency H57 = 520-564MHz Pair with SHR-SLXD4H57 or SHR-SLXD4DH57 Receivers Featuring a SM58 handheld wireless microphone transmitter, SLXD2/SM58 combines professional features with simplified setup and operation.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 SLXD2 easily syncs with a wireless receiver. A variety of interchangeable vocal microphone choices guarantees the right solution for a wide range of applications, from day-long conference to night-time performances. Features - Transparent 24-bit digital audio - 120 dB dynamic range - Digital predictive switching diversity - Up to 10 compatible systems per 6MHz TV band; 12 systems per 8 MHz bandv - Easy pairing of transmitters and receivers over scan and IR sync - Up to 8 hours from 2 AA batteries or optional Shure SB903 rechargeable battery - Interchangeable microphone capsules - Rugged metal construction