1.NRR: 22dB 2.Any color availabe 3.Window on cups for changing batteries 4.Wear comfortable 5.Two circuit boards 1. The earmuff can amplifies low pitch sounds, break off within milliseconds when sounds above 85 dB.2. Two On/Off switches with volume control on both cups3. Powered by four AAA batteries (not included). 4. There is a 3.5mm jack you can connect walkie-talkie and other device.5. Adjustable headband, fold for convenient storage.6. Receiving voice at frequency:   400 to 4, 000Hz 7. Certificate: CE, RoHS.

Shooting electronic hearing protector/ earmuff/ ear protector