Philips Wireless TV Headphones SHD8850

Acoustically tuned 40mm drivers High-resolution audio 20-hour runtime 30m wireless range Auto on/off Auto-adjustable fit Fits all televisions Velour ear cushions Easy charging Acoustic system: Open Magnet type: Neodymium Speaker diameter: 40 mm Signal/noise ratio: >75 dB Impedance: 24 Ohm Frequency range: 8-40,000Hz (when wired); 8-22,500 wireless mode) Modulation: FHSS Effective range: 30m Channel selection: Automatic Channel separation: >40 dB Number of channel: 15 Automatic power off: Yes Battery low indication: Yes Operating time: ~20 hours Battery charging indicator: Yes Base station features: LED indicator AC/DC Adaptor: 5V/ 550mA DC Included accessories: Optical cable Power supply headphone: 2 x AAA 1.2V NiMH rechargeable battery Power supply transmitter: 5V 550mA DC 3.5mm headphone jack: Yes Input connections: Digital optical line in