Shure SLXD2/SM58 H56, Digital UHF Hand-Held Transmitter, Frequency range: 518 - 562 MHz, With dynamic SM58 microphone capsule, Microphone polar pattern: Cardioid, Microphone frequency range: 50 - 15,000 Hz, 24 Bit / 48 kHz audio transmission, 120 dB dynamic range, 44 MHz switching bandwidth, Switchable transmission power: 1 mW / 10 mW, External charging contacts, Transmitter operates on 1.5V AA batteries, optionally also with Li-Ion battery SB903 (not included), Includes microphone clamp, storage bag and 2x AA batteries