Sony MDRRF985RK 仕様ガイド

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Untangle your mind and relax with crisp, personal audio without wires. They also 
feature a comfortable headband and long battery life up to 25 hours. 
Specifications
900 MHz Analog RF wireless headphone
Bullets
•  Wireless FM headphones for cord-free listening
•  40 mm driver units for expressive sound
•  Easy-adjust headband for long term comfort
•  Noise reduction system for minimal transmission noise
•  Automatic tuning for optimum signal reception
•  Up to 45 meter (150 feet) reception range
1
•  Approximate 25 hour battery life
1
•  Fast recharge: approximately 3.5 hours = full charge
1
•  Volume control on headphones
•  Easy connection of TV, Hi-Fi, and other components
Audio
Audio Modes
Mute: Operates when RF signal is weak or not received
Channel Selection
Select by a slide switch
Driver Unit
40 mm
Effective Range
Approximately 150 feet (45 m)
Frequency 
Response
10-22000 Hz
Transmitter
Ch1: 915.5 MHz, Ch2: 916.0 MHz, Ch3: 916.5 MHz 
(selective, FM Stereo)
Features
Cordless Headphones
Enjoy high-fidelity sound, at home, in wireless freedom.
Long-term comfort
The easy-adjust headband allows for long-term comfort and ease-of-use.
Expressive sound
40mm drivers deliver deeper bass and audio clarity for a superior home entertainment 
experience.
Quality sound
Wireless radio-frequency transmission provides quality indoor transmission. (Up to approximately 
150 ft)¹
Fast charging
Quick charging your headphones is a breeze with the secure charging system. A 3.5 hour charge 
will produce a full charge of approximately 25 hours. recharge function.
MDR-RF985RK