The Sena Tufftalk allows you to 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. The Tufftalk features Bluetooth 4.1 technology, allowing you communicate in crystal-clear HD audio. The HD-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, users also have the option to connect via two-way radio. The Tufftalk headset 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.