Built-in programmable two-way communication radio allows for clear, hands-free communication in high levels of noise without cumbersome cables or cords Headset is available in headband, neckband, and hard hat attached configurations The headset can be programmed to use up to 70 unique two-way radio channels using analog and/or DMR digital modulation Simultaneous, seamless connection to multiple external devices using Bluetooth® technology Noise attenuating ear cups help provide hearing protection in environments with potentially hazardous noise Environmental microphones for level-dependent hearing protection and ambient listening Noise-cancelling waterproof speech microphone with voice operated transmission (VOX) for hands-free operation; helps provide clear communication in noisy and demanding environments External jack allows you to connect to a smart phone, radio, shoulder mic, or other external devices User-friendly controls with voice-guided menu Battery Life 11 hr Colour Dark Blue Connector Size 1.6 mm Meets/Exceeds CSA Class AL NRR dB 28 Style Headband