ADX2/SM58, like all ADX transmitters, sets the stage for exceptional performance, with wide tuning up to 184 MHz, interference protection, advanced rechargeability, streamlined design, and ShowLink remote control for real-time parameter adjustments right from the booth.Main Features: Durable, moisture-resistant, lightweight metal case Available in black or nickel finish Up to 9 hours of runtime with SB920 rechargeable batteries External contacts for docked charging with optional fully covered radome Diversity ShowLink enabled for remote transmitter control and automatic interference avoidance Two transmission modes: Standard for optimal coverage and new High Density for maximum system channel count and robust coverage Encryption-enabled, secure transmissionSpecifications: Mic Offset Range: 12 to 21 dB (in 3 dB steps) Battery Type: Shure SB920 Rechargeable Li-Ion Battery Runtime @ 10 mW: Shure SB920: Up to 9 hours Dimensions: 254 mm 51 mm (10.0 in. 2.0 in.) L Dia. Weight: 179 g (6.3 oz.), without battery Housing: Cast AluminumAudio Input: Configuration: Unbalanced Maximum Input Level 1 kHz at 1% THD: 145 dB SPL, typical (SM58) Note: dependent on microphone typeRF Output: Antenna Type: Dual-Band Helical Occupied Bandwidth: <200 kHz Modulation Type: Shure Axient Digital Proprietary Power: 2 mW, 10 mW, 20 mW, 40mWShowLink: Network Type: IEEE 802.15.4 Antenna Type: ZigBee Dual Conformal Frequency Range: 2.40 to 2.4835 GHz (24 Channels) RF Output Power (Varies by Region): 10 dBm (ERP)