PSSH-20. Bluetooth talking helmet. Suitable for bicycles, mountain bikes, balance cars, scooters, pulleys, electric motorcycles, road cars and other outdoor sports to ride safely. Smart Bluetooth Helmet: PSSH-20 Material: PC+EPS Size: L58-62cm, 220g Battery: 3.7V/400mAh Intelligent warning: GPS positioning rescue + SOS alarm Bluetooth transmission: 10M-12M Speaker: 2X1W (stereo) Microphone: -39dB -41dB Bluetooth mode: BT4.1 Electrical parameters: USB TYPE DC 5V/0.5A Charging mode: Micro USB 3h Battery life: 4-6h 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 USD64.62 2. 20set, USD38.77 3. 40set, USD34.89 4. 60set, USD31.40 5. 80set, USD28.26 6. 100set, USD25.43