PANASONIC RPWF950B - Cordless Headphones with up to 20hrs playback

Features

Head Phone
Drive Unit(mm) f40
Battery
Battery type Ni-MH Rechargeable battery
Recharge time 24h
Life(Full charge) 20h
Weight(g) w/o Battery 190.0
General Specification
Beam length(nm) Wireless
Modulation method FM
Carrier Frequency(MHz) 863-865MHz
Transmit distance(m) 100.0
Frequency Response(Hz-kHz) 18-22kHz
Distortion at 1kHz 1%
Transmitter
Power supply DC12V 300mA AC Adaptor
Dimension
Length(mm) 160.0
Height(mm) 115.0
Depth(mm) 125.0
Weight(g) 240.0
Connection Cord(m) 2.2