Mono Channel UHF Wireless Microphone. Carrier Frequency Range: 795.85mHz Equipped with 1 handheld microphone, receiver, conversion plug, 6.3mm adaptor, USB cable. Wireless headset microphone with volume adjustment & built-in rechargeable lithium battery. Wireless headset microphone & receiver with USB plug for recharge lithium battery (DC 5V). Power saving with built-in rechargeable lithium battery. Light weight and easy to carry. Ideal for lectures, religious places, presentation, interview, etc.