SHIDU U9 Dual Wireless Headset Universal Wireless Microphone with Transmitter

Model: U9 | Operating Frequency: 700–730MHz | Frequency Range: 30–20,000Hz | Microphone Parameters: Battery Capacity: 3.7V 550mAh | Output Impedance: ≤2.2KΩ | Size: 130×160×130mm | Weight: 49g | Receiver Parameters: Battery Capacity: 3.7V 750mAh | Size: 105×36×19mm | Weight: 45g