Operating Frequency : 2.4 GHz (2.4 to 2.483.5)
Type : Around-ear, open-aire, dynamic
Frequency Response : 16 Hz - 22 kHz
SPL : 106 dB max
Total Harmonic Distortion : < 0.1%
Signal to Noise Ratio : 90 dB
Sampling Rate : Supports signals up to 96 kHz (downsamples to 44.1 kHz)
Connectors :
1 x Stereo RCA analog input
1 x Toslink optical digital input
1 x S/PDIF coaxial digital input

Power -
Headphones : 2 x AAA NiMH batteries (BA 200m, 930 mAh, 1.2 V)
Transmitter : 9 VDC, 1A power supply

Battery Life : Up to 8 hours (6-8 hours average)
Weight -
Headphones : 329 g (11.1 oz)
Transmitter : 484 g (16.4 oz)

Headphones (HDR 220)
Transmitter (TR 220)
2 x Rechargeable Batteries (BA 200)
Power Cable
4 x Multi-Country Adapters (US, UK, AUS, EU)
RCA Analog Audio Cable
Coaxial Digital Audio Cable