PS-C21. Functional headlight helmet. Suitable for bicycles, mountain bikes, balance cars, scooters, pulleys, electric motorcycles, road cars and other outdoor sports to ride safely. Functional headlight helmet: PS-C21 Material: PC+EPS Size: L57-61cm, 190g Battery: 3.7V /450mAh Speaker: 2X1W (stereo) Microphone: -39dB -41dB Electrical parameters: USB TYPE DC 5V/0.5A Charging mode: Magnetic charging for 2h Battery life: 4-6h Function lights: automatic brake warning light, light sensing mode (fast flash, tidal), constant light mode (strobe), MP3 + light life 6h, ARGB LED colorful taillight + left/right turn signal>10h Three-button operating system: power on (play, pause, power off), volume + (next song), volume - (previous song), answering calls, voice navigation, connection flash (left turn light, right turn light, double flashing light), MP3 music To achieve substantive business transactions, and enjoy more preferential policies Step Price (FOB): 1.Single price USD143.08 2. 20set, USD85.85 3. 40set, USD77.27 4. 60set, USD69.54 5. 80set, USD62.59 6. 100set, USD56.33 Single product packaging: Carton size: 310*250*190mm Product gross weight: 0.64KG Packing size: 610*360*495mm Gross packing weight: 7 kg Packing Quantity: 8 pieces