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 Universal bike/motorcycle mount for most smartphones Quickly and easily mount and unmount your phone Fits motorcycle and bicycle handlebars 1.25" diameter and smaller 360 degree rotation adjustable and tilt allows you to view your phone horizontally or vertically 3.7V/5000mAh battery capacity