PNR-1000AC audio technology 1.Full spectrum stereo response 2.Each ear cup independent volume control 3.Aviation headset/he Aviation headset RAN-1000AC with Super Soft Double Foam Head PadOverview  ANR Aviation Headset (ANR power: 9V battery)  GA Use Dual Plugs   Super Soft Double Foam Head Pad  Noise-canceling electret Microphone  Precision flexible boom for perfect microphone placement  Easy-to-wear super soft silicone gel ear seals  Headband Size Adjustment  Straight cord from headset to molded plug, 150CM  Assembled strictly following the FAA TSO standards  Color: Black, green   Noise Reduction Ratings (NRR):24dB  Specifications  Headphone  General  Type: Dynamic (F30)  Operating Temperature: -20 to 70°C  Frequency Response:50 Hz to 20 kHz  Cordage: Straight cord from headset to molded  Sensitivity:95+/-5 dB SPL (1 kHz, 1 mW input per earcup  plug, 150CM  side) full volume on ear simulator  Intercom Connections Plug:   Active Noise Attenuation:  Earphone Plug: PJ-055( .25"F6.3 phone plug)  Dynamic 42 ohms:  Microphone Plug:PJ-068( .206"F5.2 phone plug)  Rate Input: 30mW     Max.Input:100mW  Weights: 600g  Speech Sound:  Noise Reduction Specifications:   Dynamic 300 ohms:  Attenuation Frequency  Rate Input: 30mW     Max.Input:100mW  Band__________20Hz~20KHz  Microphone and Amplifier:  Main Attenuation Frequency  Element Type: Noise-canceling electret  Band__________20Hz~600Hz  Frequency Response:100Hz to 5 kHz  Attenuation Capability__________18~21dB   Operating Voltage (supplied by aircraft ):8-32 Volts DC   Power Consumption__________30 mW   Matching Impedance: 150-1000 ohms   Headset size range Height: 10 to 14 cm   Sensitivity:-33+/-4 dB    Color: Green/Black   (ref: 0dB SPL=20.0uPa at 1 kHz with 10 Vdc 150 ohms AC   Boom: Flexible Boom   load)    

Aviation headset RAN-1000AC with Super Soft Double Foam Head Pad