Wireless System 5.8 GHz band, signal range 50 m, operation up to 6 hours, audio frequency range 30 - 20,000 Hz (+/- 3 dB), 4 selectable channels, up to 170º angle adjustable Jack 6.3, rechargeable lithium batteries in both the transmitter and receiver, set contains one receiver and one transmitter, suitable e.g. for audio transfer between mixer and speaker, included power cable Y with 2x microUSB connectors and one USB connector and transport case