NEW in Box DOT Safety Motorcycle Helmet Bluetooth: Made of stronger ABS shell, designed with dual visor, breathable liners and multiple air vents system, FreedConn motorcycle Bluetooth helmet meets DOT and FMVSS-218 safety standards, ensures safety and comfortability for all-day wearing. Smart Motorcycle Helmet with Bluetooth 5.0 Built In: Upgraded Bluetooth motorcycle helmet in 5.0 version supports maximum intercom range of 1680 feet between 2 riders ( 3 can connect). One touch control button with jog dial to make hands-free calls ( Supports Siri/ S Voice), previous/ next song, FM radio, GPS guide. Enjoy personal ride or communicate with other nearby FreedConn BM2-S/ BM12 full face motorcycle helmet is quite easy and convenient. Helmet Bluetooth Speakers and Microphone: Equipped high quality speakers with DSP noise suppression technology give you loud and clear audio clarity while riding at highway speed, you will enjoy clear communication, music and built in FM radio. Same Shell + Changeable Paddings: FreedConn Bluetooth helmet using same outer shell with fully washable microfiber lining in different thickness to adjust size. For best fit, please select 1 size larger than usually wear. If motocross helmet doesn't fit well, we'll ship you requested large/ smaller size linning. Featuring lightweight design, flip up sun visor and 3-way ventilation, you'll feel it comfortable to wear. Bluetooth modular motorcycle helmet with 500mah battery allow you to talk and listen to music for 8-10 hours with single charge and 300 hours standby. Just note that the battery will enter deep sleep if no use for long time. Charge it at least 1 time a month, and follow the steps to wake it up if happens: 1. Use standard 5V 1A charger to charge it 0.5h. 2. Unplug it. 3. Charge again for 2-3h. To protect battery, we don't suggest you to charge it over night ( No indicator light on battery)