Poweradd&trade; Bluetooth Bracelet Smart Watch OLED Display, Incoming Call,Digital Time Display,Music Player,Anti-Lost Alarm,Vibration with Most Bluetooth Mobile Phone (Green) Bluetooth bracelet let you far away from mobile phone radiation,more safety when driving with the hands-free function. Synchronous your telephone directory,incoming calls name exist on your directory will displayed on the screen. Anti-lost alarm design,the distance of cellphone and bracelets more than ten meters,the anti lost function will start by vibration and sound sustained 30S. Stylish smart watch with 24 hours OLED time display,built-in rechargeable lithium polymer battery provide 72 hours stand-by time. Package contents:Poweradd& bluetooth bracelet;Charging cable;User manual.