... and set extra sleeping time.19. Built-in game: 2 embedded common games,mobile phone QQ,ludo. ... shiftslide to unlock, incoming call turn-to-mute, wallpaper change21. Special function: Unique design of the plug-and-play keyboard ... , dual standby and dual Bluetooth, display land ownership of incoming call, IP talk, calendar, calculator, currency exchange calculate, ... 50/60Hz Output:5V-500Ma Output:4.2V-300mA