Solid state circuitry allows normal speech and sounds to be heard but automatically deadens noise above 85dB. On/Off switch with adjustable volume control. Auto-adjust head band. Requires 2 x AA batteries, providing approx 200hrs of use. Conforms to EN352-1. Protection levels: H=30 M=28 L=22 SNR=30dB.
Deadens noise above 85dB
Allows speech to be heard
Solid state electronic circuitry
Rotary on/off adjustable volume control
Requires 2 x AA batteries