Xvive U3R Digital Wireless Microphone Receiver, Dynamic, Black

U3 Receiver only XLR Out: XLR microphone input jack Power switch: switches the unit on and off Channel status LED: indicates selected channel switch: selects Channels 1-6 USB Port: For charging the battery RF Status LED: On = Transmitter is on and link is established Flashing = Signal connection interference Off = Transmitter off or unlinked 7 Power status Led: indicates power status. Led off = 100% ~ 30% Solid red = 29% ~ 11% Flickering red = less than 10% Antenna See U3 Complete System Here (Receiver and Transmitter) Specs Dimensions 31 X 29 X 98 mm Weight 93g Housing Molded Plastic And Cast Metal Battery 3.7V Rechargeable Li-lon, 860mA Impedance Input 15ohms (1KHz) Audio Output Connector  Balanced XLR Female Output Maximum Output Level 2.8Vp-p Battery Life Up To 5 Hours Antenna Impedance 50ohms Antenna Type 1/4 Wave Sleeve Dipole, Non-removable Number Of Antenna 2