Pictured is the AD-1000 ANR (Active Noise Reduction) Aviation Headset. It comes complete with Gel Ear Seals, Battery Box and PP3 Battery.

 
AD-1000 Aviation Headset Technical Specifications

General Description:
The AD-1000 is designed for maximum comfort in extremely high noise, low frequency environments. The use of advanced electro-acoustical noise reduction circuitry with a patented baffle-plate design provides one of the strongest active noise cancelling signals available. The acoustically balanced audio system (ABAS) amplifies the incoming audio signal to deliver a rich, high fidelity audio sound not found in comparable priced headsets. These superior quality aviation headphones with integral, flexible boom microphone are designed for light aircraft use.

General Data:
Noise cancelling bandwidth: 20 Hz through 800Hz
Operating voltage: 7.5 volts minimum - 10.0 volts maximum
Battery life:15 hours on 9 volts

Earphones (audio)
Impedence: 150 ohm
Rated input power: 100 mW nominal - 200 mW maximum
Frequency response (audio) 50 Hz ~ 20 KHz

Microphone - Noise cancelling condenser
Impedance: Low impedance
Windsheild External 'pop' filter
Frequency response: 50Hz to 8kHz

Noise Attenuation