Gain: 16dB Operating Frequency Band: 2.4GHz Operating Circuit: 30mA-50mA Operating Time: 15h Frequency Response: 20Hz-20kHz; Receiver parameters include a charging circuit of 425mA, operating current of 30mA-45mA, and a wireless distance of 20-50m. Transmitter Parameters: Gain: 16dB Operating Frequency Band: 2.4GHz Operating Circuit: 30mA-50mA Operating Time: 15h Frequency Response: 20Hz-20kHz Receiver Parameters: Charging Circuit: 425mA Operating Current: 30mA-45mA Operating Frequency Band: 2.4GHz Frequency Response: 20Hz-20kHz Operating Time: 7h Power Supply: 250mAh 3.7V Polymer Lithium Battery Wireless Distance: 20-50m Charging Current: 425mA Color: Black Material: ABS Specification: 1 to 1 Package Contents: 1 set of UHF XLR Adapter System Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.