Drive Unit Diameter : 40 mm
Frequency Response : 18Hz -22kHz
Transmission Distance : 8m / 26 ft.
Battery Life : Up to 20 Hours
Modulation Method : Infrared
Battery : NiMH
5.1 ch Surround Sound : 2ch. stereo
Dolby Digital
Dolby Pro Logic2
DTS
DTS-ES
Dolby Digital Surround EX
3-Surround Mode : Cinema/Music/Voice
Auto Power On / Off : Yes
Weight : 340g / 0.74 lbs