Shure SLXD14D+E K55 - Digital 2-channel UHF wireless system; consisting of an SLXD4+ dual receiver and two pocket transmitters with TA4M connector; transmission range: 606-694 MHz; audio transmission: 24-bit/48 kHz; dynamic range: >118 dB; Switching bandwidth: 138 MHz; switchable transmit power: 1 mW/ 10 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: 930 g (receiver), 89 g (pocket transmitter); includes 19" mounting accessories, WA305 instrument cables, power supply, 1/4 lambda antennas, carrying bags and AA batteries