1. Laboratory tested NRR 23dB.
2.LED power indicator.
3.On/Off switch with volume control.
4.Solid-state circuit.
5.Built-in microphone amplifies low-level sounds.
6.Attenuates noise over 85db.
7.Soft & wide form filled ear cushions.
8.Comfortable with Safety Helmet.
9.Powered by 2 AA batteries (not included),
two AA batteries provide 200+ hours of service.
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