Details: The Cavalry comes pre-wired and ready to go with built-in Bluetooth capabilities and controls, so users can enjoy all of the great features of Sena's communication devices without the hassle of installing a headset. Chat with your buddies over the intercom system or take calls directly through your helmet with the built-in microphone for crystal clear conversations, and hear your music louder and clearer than ever before thanks to the built in half-helmet speakers on each side along with optional ear cups to boost the audio level while you're out on the open road. The technology included in this revolutionary helmet is our most up to date Bluetooth 4.1 features, so you can keep the chitchat going, share a playlist with another riding companion, listen to FM radio, or patch in your friend over the half-helmet intercom while you're on a phone call. The Bluetooth half-helmet does it all with top notch sound quality and Sena's Advanced Noise Control () Technology at ranges of up to 900 meters (0.5 miles) for 10 hours of Talk time. High quality speakers deliver crystal clear audio in a seamless design built right into the helmet. Engineered with Advanced Noise Control , Wind Noise Reduction, built-in SBC Codec and Wide Volume Control for maximizing the functionality of your Cavalry Half Helmet. Cavalry is the Bluetooth motorcycle half-helmet you've been waiting for. Linking up your Cavalry with the Sena Headset App (for Android or iPhone) allows you to configure device settings, create FM radio and Speed Dial presets, and access an interactive quick start guide. As with all Sena units, keep your unit up to date with our firmware upgrades.