Fishman Airlock Wireless GT; High-End 2.4GHz digital wireless instrument system; plug-n-play transmitter & receiver; 2.4GHz band; 24 bit; 24-bit Audio Output via Receiver USB; input impedance (transmitter B1): approx. 1 Megaohm; 80 channels; up to 8 Systems can be used simultaneously; transmission range up to 40 meters; latency < 4,9 ms; integrated rechargeable Li-Po battery (User replaceable); battery run time up to 9 hours Battery Low/Charge LED Pair Button and LED; frequency response 20Hz-20kHz; Dynamic Range: 118 dB; incl: Lightweight Molded EVA Case USB Charge Y-Cable (USB Charger Not Included), USB Data Cable USB A-to-C Adapter; Dimensions: (W x D x H): 203 x 152 x 51 mm, (8" x 6" x 2"); Weight: 454 g (1 lbs)