The SM1R IS Headband Headset is built specifically to enhance two-way radio communication in high-noise environments. The IS headset is unique from the rest of Sensear’s portfolio in that it contains no battery and instead is powered by the radio, making the unit lighter and more comfortable for the user. Similar to the rest of Sensear’s portfolio, it pairs Sensear’s patented SENS technology and a noise-canceling boom mic to allow users in high-noise environments to communicate either via face-to-face or two-way radios while maintaining 360° audible awareness of their surroundings and protecting their hearing. !!Cable Required for connection to a Two-Way Radio (cable sold separately: SRCK60XX0001 series); Here are just some of the many features and benefits that Sensear’s two-way radio IS headset products have to offer. Clear two way radio communication up to 120 dB noise levels with Noise-Canceling boom mic; Limit ‘in-ear’ noise exposure to 82 dB(A); Connects to industry-leading two-way radios via wired connection; IS Headset is powered by the radio, so it does not have an internal battery and does not require charging, making the unit lighter & more comfortable; Up to 27 dB NRR (Noise Reduction Rating); Available in headband, behind-the-neck, and helmet style; Rugged lightweight design; Talk 'face to face' in high noise (No need to remove your headset or move to a quiet area); SENS Technology; Enhances speech while suppressing background noise to a safe level; 360° situational awareness - remain aware of surrounding noises and hazards; VOX capable; USB for programming allows simple configuration of the headset and software updates.