3M 7100204441 is a wired protective communication device designed for hearing protection. With an attenuation rating of 25 dB and a CSA Class A certification, it ensures a high level of safety. The neckband style offers comfortable and secure wear. The product features a built-in two-way radio with a battery life of approximately 20 hours. It is suitable for communication in two-way radio systems, making it ideal for professional use. The device is lightweight, weighing 384 g (13.545 oz), and is powered by AA batteries or a rechargeable NiMH pack. Overall, it offers reliable and convenient communication in noisy environments without compromising hearing protection.