Shure SLXD24/B58 Digital Wireless Microphone System - Includes SLXD2 Handheld Transmitter with BETA 58A Vocal Mic Capsule and SLXD4 Single Channel Rack Mount Receiver | G58 Band (SLXD24/B58-G58)WIRELESS FREQUENCY BAND SELECTION: Before purchasing, please ensure that the wireless frequency band you select works in your area (refer to Shure website for details > search Shure Wireless Frequency Finder).WHAT'S IN THE BOX: (2) SLXD2 handheld transmitter with Beta 58A cardioid dynamic microphone capsules and (1) SLXD4D dual-channel receiver, with antenna and rackmount accessories, (2) zippered bag and (4) AA batteriesDIGITAL WIRELESS TECHNOLOGY: 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. RF Scan and IR Sync to quickly find an open frequency and link the transmitter to a SLX-D receiver. Easy pairing of transmitters and receivers over IR scan and sync.BATTERY LIFE: Up to 8 hours from 2 AA batteries. Upgrade to the optional Shure SB903 Lithium-ion rechargeable battery to monitor battery charge status in hours and minutes, as well as battery life and health statistics.SOUND QUALITY: Crystal clear 24-bit / 48 kHz digital audio. Extended 20 Hz to 20 kHz frequency response (microphone dependent) for natural and clear sound. Stable digital RF signal transmission. 120 dB dynamic range - excellent for vocals & acoustic and wind instruments.OPERATING RANGE: 330-feet (100-meters).APPLICATIONS: A variety of compatible microphone/instrument cable choices guarantees the right solution for a wide range of applications, from day-long presentations to nighttime performances.