ATOP World Time Travel Alarm Clock WR-7G Globe Model Case: anodized aluminum ally with rolling silk printing. Glass: hardened. Dial: copper alloy. Hands: copper alloy with luminous function. Dial color: Silver. Body color: Silver. Whole world map with lines of 24 time zones and city names are printed on the side of the clock body. On the side bezel, there are inserted one small diamond to point the regular time. Laser engraving D.S.T mark to point the summer time (Day light saving time). Size: diameter 50mm x length 39mm. Weight: 118 gm. Cleaning the case, use a soft cloth, do not use any chemical cleaners. Ambient temperature range 25 degree F to 122 degree F. This World Time Alarm Clock comes in its own box along with a stand, instruction manual and battery included.