White Big Bling Diamond Crystal Calculator Calendar Time Alarm Clock Xmas Gift Color: White; Power Source: Battery (Battery Can be replace after ran out of power) Size: 18 cm x 11.5 cm 1: Can be use as Calculator 2: Can be use as Calendar 3: Can be use as Alarm Clock 4: With 16 different Countries' City Time to transfer (London/Paris/ Cairo/Moscow/Karachi/Bangkok/HongKong/Tokyo/Sydney/Wellington/Honolulu/Los Angeles/Denver/Chicago/New York/Rio De Janeiro)