Usage Tips:[Portable Small Travel Alarm Clock]: LCD (1.8"x 1.4") screen display time (12H / 24H), temperature (C/F), date and week. Clock dimensions: 2.8"x 2.6"x 0.8", 0.1 pounds. Sturdy and lightweight .ABS plastic shell with folding design and pocket size meet the need of taking for travel. [Repeating Snooze Function]: When the clock rings, press the snooze button , the ring will go on again after 5 minutes. Softly wake you up from dreams. The bell doesn't sound too loud and not suitable for heavy sleeper.This clock design for travel clock not alarm clock. [Soft Night Light Function]: Pressing the button of LIGHT, the display can keep lighting for 5 seconds. You can see the time in the dark, but not dazzling.Not auto -on,no dimmable,a light that is on only when pressing the night-light so it doesn't shine on you all night. [Suitable For]: Mini battery operated clock, Outdoor for travel,campaign,outdoor activities,climbing; Indoor for bedroom,dinning room ,study room ,dorm ,beside bed and so on. [Battery Powered]: 2 x CR batteries (battery included,can be used for 9-12 months). Can be safely used outdoors. [NOT for heavy sleepers]: travel battery alarm clock, it is only for light sleepers easily awakened by faint beeping of short duration.