Feature: Microphone wireless system feature XLR interfaces, just plug on and turn your favorite mics into wireless mics. Adopting advanced wireless UHF technology, the signal transmission becomes more stable. Equipped with 10 groups of channels, you can switch the channel as your requirement, so as to interference from other equipments. Built-in rechargeable lithium battery, support continuous working up to 3 hours, after being fully charged. Widely applicable for live streaming, recording studios, meeting, speaking, interviewing, karaoke, etc. Get rid of wire limitations, allowing you to enjoy the fun and convenience of wireless. Specification: Brand: Muslady Model: UR-4 -- Transmitter -- Microphone Max Input: 1.5VRMs RF Carrier Frequency : 901m-910m Max Transmitting Power: 8dbm Working Temperature: -20℃-80℃ Working Current: 120mA Battery Capacity: 700mAh Transmitter Size: 9.2 * 3.1 * 2.1cm / 3.6 * 1.2 * 0.8inch Transmitter Weight: 67g / 2.4oz -- Receiver -- Max RF Input Signal Amplitude: 10dBm Receiving Carrier Frequency :90m-910m Receiving Sensitivity: -85dBm Audio SNR: 96dB Working Temperature: -20℃-80℃ Working Current: 120mA Battery Capacity: 1500mAh Receiver Size: 9.9 * 3.1 * 2.1cm / 3.9 * 1.2 * 0.8inch Receiver Weight: 82g / 2.9oz Package Size: 15.8 * 15.8 * 3.5cm / 6.2 * 6.2 * 1.4inch Package Weight: 360g / 12.7oz Packing List: 1 * Transmitter 1 * Receiver 2 * USB Cables 1 * User Manual Note: By default, the first channel is set as the preferred pairing channel everytime starting up.