Vktech&reg; U8/U8 Plus Bluetooth Smart Watch for Samsung iPhone EU Plug/US Plug Android phones can synchronize QQ, micro letters, text messaging capabilities, and integration of these features, the new pedometer, altitude meter functions Sync phone book, can save 1000 phone book selectable ringtones with vibration Anti-theft Alarm. Mobile security features to keep your phone in 10 meters outside of your alarm Normal Water-proof, Shock-proof, Anti-corrosion, Non-toxic