Shure SLXD24+E/Beta58 K55 – Digital 1-channel UHF wireless system; consisting of an SLXD4+ receiver and a handheld transmitter with dynamic Beta58A microphone capsule; polar pattern: supercardioid; frequency response: 20–20,000 Hz; transmission range: 606-694 MHz; Audio transmission: 24-bit/48 kHz; dynamic range: >118 dB; switching bandwidth: 88 MHz; switchable transmission power: 1 mW/ mW/ 30 mW; 14 compatible channels per 8 MHz band, 11 compatible channels per 6 MHz band; automated setup and pairing; ShowLink® Ease enables remote control and management of transmission parameters for paired devices; integrated Shure Digital Feedback Reducer software; XLR/jack output; AES-256 encryption; transmitter operation with 1.5V AA batteries (up to 8 hours of operation), optionally also with SB903 Li-ion battery (not included); Weight: 900 g (receiver), 144 g (handheld transmitter); Includes 19" mounting accessories, microphone clip, power supply, 1/4 lambda antennas, carrying case and AA batteries