Additional Headphone for the RS 185    
HDR 185    
    
    
    
Frequency Response    17 - 22，000 Hz
Max Sound Pressure Level    106 dB at 1kHz， 3% THD
THD Total Harmonic Distortion    <0.5% at 1kHz， 100 dB SPL
Transducer Principle    Dynamic， Open
Weight    310g (battery included)
Operating time    Max 18hr
    
    
    
1. Level button (choose between Automatic Level Control(ALC) mode or manual Level Control (MLC) mode)    
2. Balance L button    3. Balance R button
4. Volume - button    5. Volume + button
    
Balance control located on the headset for convenient adjustment    
Manual input level and balance controls enables you to fine-tune the details of each track in stunning acoustic clarity.    
    
    
    
How to Control Balance    
    
Press Balance R or Balance L button to adjust volume    
    
    
Press both Balance L and Balance R together to make volume even on both side.    
    
    
Battery insert and replacement    
    
    
Rechargeable 2 AAA NiMH batteries included