Sony MDR-RF811RK

Weight: 270 g
Design: Full size
Description: Design: full-size, device type: wireless headphones, design features: neodymium magnets, acoustic design type: closed, functions: volume control, operating time: 13 hours
Additional Information: Battery type: AAA; Transmitter frequency range: 863.52 MHz, 864.52 MHz; Range: 100 m; Data transmission channel: radio channel; Replaceable ear pads: yes; Number of transmitter channels: 2
Functions: Volume control
Working hours: 1.3 h
Design features: Neodymium magnets
Device type: Wireless headphones
Mount type: Headband
Maximum playback frequency: 20000 Hz
Minimum repeatable frequency: 20 Hz
Technology: Dynamic
Membrane diameter: 40 mm
Type of acoustic design: Closed
Wireless connection type: Radio channel
Number of drivers: 1