New alkaline batteries provide approximately 350 hours for operation. Battery Replacement:, ON/OFF wheel on the right side. machines, AAA Batteries, The Electronic Operator Earmuff amplifies surrounding sounds such as voices, then slide upward with your thumbs. - Place the earcups over the outer ear. etc, Remove the old batteries, : LAPG Electronic Sound Amplification Operator Shooting Earmuff - Army : Sports & Outdoors, Loud impulse sounds are effectively blocked out and limited to safe levels. Ensure the battery lid is closed completely. Open the battery lid by pushing the battery lid, For best results, 2, and warning signals to safe levels yet it provides good hearing protection. remove all hair under the cushion, Warning - performance may deteriorate with battery usage, cell phones and radio scanners, After automatic shut-off, Auto shut-off function: 4 hours, The ear cushions should seal firmly against the head. hats, Turn earmuff on again to another 4 hours of working time, AUX input allows connection to external MP3 players or other audio devices for additional listening off the field, Noise Reduction Rating: 22dB, : LAPG Electronic Sound Amplification Operator Shooting Earmuff - Army : Sports & Outdoors. 5v AAA alkaline batteries into battery compartment. Insert two new 1, Uses Two, - Extend the headband before use. Not Included, such as thick spectacle frames, Fitting Instructions:, - Adjust the headband by moving it up and down in the side headbands, Change the batteries whenever the sound reproduction is weakened or impaired. wait 5 seconds, This earmuff is provided with electronic audio jack input for connection with MP3 players, Noise reduction will be adversely affected by anything that impairs the seal of the earmuff cushions against the head.