• Impact Sport Electronic Earmuff
• Mfr. item number - R01526
• External audio input connects to Mp3 players & scanners
• Amplifies conversation & commands with one single volume control knob
• Automatic 4-hour shut-off increases battery life
• Automatically blocks noise about 82 dB
• Noise Reduction Rating - 22
• Adjustable, low-profile design folds easily for storage
• Built-in microphones amplify range commands to capture low-level sounds
• Weight: Approximately 1.4 pounds
• Shipping Dimensions: Approximately 9.5 x 8.5 x 4.5 inches.