3S Headset - Universal 3S Plus Bluetooth® Headset Universal The 3S Plus Universal headset utilizes Bluetooth® 4.1 to deliver incoming and outgoing audio for music, phone calls, GPS directions, and intercom conversations with a passenger or a riding companion up to 400 meters (0.25 miles) away This Bluetooth headset allows up to eight hours of talk time on a single charge and seven days of standby time The 3S Plus Universal is able to be applied to a wide variety of helmets, the two-button control module attaches to the helmet’s shell for easy control access and a minimalist look Charging the headset is easy thanks to the new USB-C connection Included with the 3S Plus Universal are two wired microphone extensions. Select between standard and boom microphone for your best fit Speaker drive unit: 23 mm - thickness 4.3 mm Boom Microphone: length 120 mm Wired Microphone: length 180 mm