Sony MDRRF985RK Specification Guide

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1. Actual battery life will vary based on product settings, usage patterns, battery and environmental conditions.
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Sony is a trademark of Sony. All other trademarks are property of their respective owners.
Features and specifications are subject to change without notice. Non-metric weights and measures are approximate and may vary.  Updated: December 13, 2012
Tuning
Manual tuning via switch on both base and 
headphones
Volume Control
Yes (Rotary)
General
Design
Over-the-head, Home-music/movie/games
Diaphragm
PET
Headband
Wide, Easy-Adjust
Magnet
Ferrite
Power On/Off
Power turns ON when headphones are worn; Red LED 
illuminates
Type of Use
Home
Hardware
Communication
Wireless Analog 900 mHz Radio Frequency
Headphone Type
Closed, Dynamic
Inputs and Outputs
Audio In
Analog Phono Input (left/right), Analog Stereo Input mini 
jack (x1) 
Power
Battery Charging 
(Approx)
3.5 H (to fully charge an empty battery); Battery is 
charged by placing MDR on TMR
Battery Life 
(Approx)
25 H (with fully charged supplied Li-Ion battery pack)
Battery Type
Rechargeable Lithium-Ion rechargeable battery
Internal Power 
Supply
Transmitter: Supplied AC adapter (12 V, 200 mA)
Output Power
5 mW + 5 mW
Power 
Requirements
DC 12 V (from supplied AC Adaptor)
Weights and Measurements
Cord Length 
(Approx.)
Cord Length (Approx.): 39 3/8 in. (1.0 m) Stereo 
connecting cable
Dimensions 
(Approx.)
Transmitter: 8 5/8 x 4 1/4 x 3 7/8 in. (216 x 105 x 96 mm)
Weight (Approx.)
Headphones: Approximately 10.59 oz. (300 grams) 
Including supplied battery
Transmitter: Approximately 7.7 oz. (220 grams)