SpecificationsWireless Radio Frequency (RF 863-865 MHz Stereo) technology, Allows you to Listen To Audio and Video Programmes, Granting Freedom Of movement. No Line-Of-Sight limitation, roam freely without restriction (100m Range) Digital-audio optical input.Connects with all Analog And Digital Audio Devices (TV, Blu-ray, CD, DVD, Hi-Fi, Amplifier, DAB etc.). Virtually Interference Free Stereo Audio with Ultra Low Distortion : 1% THD. Auto Scan frequency Adjustment.Wireless Transmitter with PLL technology, Highest Stability In Transmission. Balances sound with high quality drivers. Automatic Pairing Between The Headset and The Transmitter Base.Charging Base Transmitter Unit with Docking Stand for Headphone, Ideal For Storing and Charging The Headset After Use. 3-Channel RF Selector for Transmitter. Automatic Level Control (ALC) with Auto ON/OFF Control.Volume Control Function On The Headset. Ergonomic Headphone Design with Soft Leatherette Earpads For Longer Listening Comfort. Extra Comfort with Overhead Soft Cushion. Accessories Included: 3pin AC-Adaptor / Optical cable (toslink type) for digital audio (1.5M length) / 6.3mm (M) to 3.5mm(F) Adaptor stereo / 3.5mm (F) Stereo to RCA (M) Short Cable Adaptor / RCA (M) to 3.5mm(M) Stereo AUX Cable (1.5M length) / AAA Rechargeable NiMH Battery (1.2v, 550mAh) x 2pcs.