Pyle PHPW2 Hi-Fi Wireless FM Headphones (Super Bass, Black) Refer the user manual below for troubleshootingWireless Reception From TvWired Reception To Mp3 PlayerFm Radio & Wired Reception From Pc, Cd, Dvd PlayersFreq Range: 85 Mhz to 108 MhzRefer the user manual below for troubleshootingConnect To TV, CD, MP3 PlayerFrequency Response: 20~20,000HzSensitivity SPL: 105dB±3dB/mW at 1 kHz100 Foot Range, Sound Output Mode - Stereo. The Pyle PHPW2 Wireless Headphones provide Clear, Bright, and Full sound without the hassle and tangle of wires to get in your way. They feature a Powerful wireless transmitter, which can be connected to anything with Audio output, such as your Television, Stereo, Computer, MP3 player, etc. With over 100 Feet of range, feel free to roam with these Pyle wireless headphones. Wireless Reception from TVWired Reception to Mp3 PlayerFM Radio and Wired Reception from PC, CD, DVD PlayersReception Frequency Range: 85MHz~108MHzDriver Size: 40mmSensitivity (S.P.L): 105dB±3dB/MW (at 1 KHz)Impedance: 32 Ohms ± 15%Frequency Response: 20~20,000HzSignal/Noise Ratio: >50dBHeadphone: DC 3V (2x1.5V AAA batteries)Transmitter: DC 3V (2x1.5V AAA batteries)Maximum operation distance: 100FT, 360°