LIVALL BH60 Bike Cycling Smart Safety Bluetooth Bicycle Helmet with Tail Light Turn Signals Hands-free Phone Call Music Player Walkie-talkie SOS Alert, Phone Holder, Cadence Sensor, Remote Controller Smart Lighting: 6 LED rear lights for safety and visibility, 8 LED tail lights serve as direction indicators controlled by the Bling Jet (BJ100) Music: The built-in Bluetooth speaker lets you enjoy your music without headphones Phone: The built-in mic lets you make and receive calls on the go Walkie-Talkie: Use the Walkie-Talkie function to communicate with your riding team SOS Alert: If the gravity sensor senses impact, the LED lights will auto-display SOS signals & your emergency contacts will be notified immediately