Features
Extended frequency response and excellent overall sound quality
Supraural, hi-fi stereo headphones
On-hook charging
Soft cloth-covered ear pads & headband cushion

Technical Data
Frequency Response 20 - 20,000 Hz
THD < 0.7%
Carrier frequencies (switchable) 925.0 MHz/926.0 MHz/926.5 MHz
Maximum SPL 96 dB
Signal to Noise Ratio > 68 dBA
Modulation FM stereo
Operating time Approx. 4 hours per battery
Power Supply BA 151 rechargeable battery
Weight (HDR 40 receiver) 5.6 oz