■ Product Details It is in relatively good condition. *Please check the condition in the photos. *This is a new, unused item that has only been opened after purchase. * All accessories are shown in the images. *The instruction manual has been lost. It is available by searching online. Wireless Technology: UHF UHF Feature ①: Less susceptible to interference from Wi-Fi and Bluetooth UHF Feature ②: UHF can transmit wirelessly through walls UHF Feature 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)