Talk freely with up to 4 headsets through Bluetooth Intercom over a distance of up to 1.4 km (using the optional long antenna, default antenna range is 800 m), speaking openly and without interruption. Features Bluetooth 4.1 technology, allowing you communicate in crystal-clear HD audio. D-quality speakers deliver audio that’s clear and precise in every condition thanks to Sena’s Advanced Noise Control™ feature, ensuring that external noises won’t interfere with incoming and outgoing audio. To provide as many communication solutions as possible, these Bluetooth work earmuffs also allow the option to connect via two-way radio as an all-in-one earmuff radio. Helps to dull loud, distracting noises for optimum comfort as well as providing the necessary protection from permanent damage to your hearing, making it the ideal solution for noisy work environments. Important external sounds can also be amplified using the Ambient Mode feature to increase the awareness of your surroundings and hear unexpected sounds or calls for help, while still protected through the 24 dB audio attenuation. For further protection needs, the Tufftalk earmuffs with bluetooth also come in a Hard Hat option for more active work environments. Can be used for up to 15 hours of talk time with the included Lithium Ion rechargeable battery or 12 hours of talk time using 3 x AAA batteries. The innovative and intuitive Jog Dial makes the Tufftalk simple to use, even with gloves on. Equipped with VOX for Phone and Intercom, the voice activation makes answering calls or communicating via intercom a breeze. Using Bluetooth 4.1, pair the Tufftalk to your favorite to your smartphone or Bluetooth music device such as an MP3 player to make or receive calls and listen to all of your music through the high quality HD speakers. You can even use the Sena Smartphone App when paired to your smartphone, allowing you to easily configure all of your settings, set up speed dial presets or create FM radio station presets to listen to through the built-in FM radio feature.