1. BLUETOOTH 5.4 STEREO SOUND & HANDS-FREE CALLS — Built-in Bluetooth 5.4 speakers with 3015 cavity speakers deliver crystal-clear stereo music and hands-free phone calls while riding. 2. SMART TURN SIGNAL & LED TAIL LIGHT FOR NIGHT RIDING — Built-in turn signal lights and LED tail light let you clearly indicate directions to drivers and pedestrians. Perfect for e-bike, scooter, and mountain bike riders navigating urban traffic or riding in low-light conditions. 3. 20-HOUR BATTERY LIFE & WIRELESS REMOTE CONTROL — 800mAh built-in battery provides up to 20 hours of music and call time. Type-C fast charging fully recharges in just 2 hours. The included wireless handlebar remote lets you control music, calls, FM radio, and lights without taking hands off the handlebar. 4. IP65 WATERPROOF & BUILT-IN FM RADIO — IP65 dust and splash-proof rating protects against sweat and light rain for all-weather commuting. Built-in FM radio (87.5-108MHz) provides free entertainment on the go — no phone needed. 5. DURABLE EPS+PC+ABS CONSTRUCTION FOR ADULT RIDERS — High-strength expanded polystyrene foam core with polycarbonate and ABS shell provides reliable impact protection. Lightweight ergonomic design fits adult men and women comfortably for daily commuting, e-biking, and recreational cycling. 6. COMPLETE PACKAGE WITH 3-MONTH WARRANTY — Includes smart helmet, wireless remote control, silicone strap, Type-C charging cable, and user manual.