Wireless radio technology (RF 863-865 MHz stereo) allows you to listen to audio and video programs and offers freedom of movement without restricting the line of sight, can be moved freely (range 100 m), optical digital audio input. Connects to all analogue and digital audio devices (TV, Bluray, CD, DVD, HiFi, amplifier, DAB, etc.) Virtually interference-free stereo audio with very low distortion: 1% THD Automatic frequency adjustment. Wireless transmitter with PLL technology, maximum transmission stability Balances sound with high-quality drivers. Automatic pairing between headphones and transmitter docking station. Transmitter unit, charging station with headphone pairing, ideal for storing and charging the headphones after use. 3 channel RF selector switch for transmitter. Automatic level control (ALC) with automatic on/off control Volume control on the headphones Ergonomic design of the headphones with faux leather pads for enhanced listening comfort. More comfort with the soft head cushion. 10 hours working time of the headphones on a single charge. Frequency response: 40Hz-18KHz, S/N >54dB Environmentally friendly power supply to reduce power consumption in standby mode. Gold-plated RCA connectors for corrosion protection. Rechargeable AAAx2 NiMH batteries included (user replaceable) Dimensions: Transmitter: 184 x 150 x 54 mm / Receiver: 200 x 90 x 110 mm Weight: Transmitter: 406 g / Receiver: 256 g Accessories: AC adapter / optical cable (Toslink) for digital audio (1.5 m length) / / Stereo stereo adapter 6. .3mm (M) to 3.5mm (F) / Adapter short cable 3.5mm (F) stereo to RCA (M) / AUX stereo RCA cable (1.5m length d) / NiMH battery rechargeable AAA batteries (1.2V, 550mAh) x 2 pieces.