■ Product Details Used only once, so it's in beautiful condition. * Please check the condition in the photos. * All accessories are shown in the images. * The instruction manual has been lost. It is available online if you search for it. Wireless Technology: UHF UHF Features ①: Less susceptible to interference from Wi-Fi and Bluetooth UHF Features ②: UHF can transmit wirelessly through walls UHF Features ③: Can realistically reproduce the human voice Directivity: Uni-directional Port Type: USB, iPhone, Type-C, AUX Compatible Systems: Windows, Mac OS, Android, iOS Compatible Devices: Smartphones (iPhone & Android), PC, Speakers (AUX) Wireless Range: 30 meters Usage Time: 6 hours (transmitter) Charging Time: 1.5 hours (transmitter) Frequency Range: 806.125 - 809.750 MHz Frequency Response: 75Hz-18kHz ± 3dB Sensitivity: -69dB ± 3dB (0dB=1mV/Pa at 1KHz)