DYKIE Digital Tabletop Clock with Date Week and Temperature Display- Snooze and Large Display- (Blue Backlight)- Battery Operated LCD Home and Travel Alarm Clock, Desk Clock Black blue backlight without blinding, Backlight will be keep ON all the time when use USB Power and keep 5 seconds ON with battery only by touch the "SNOOZE/LIGHT" button. Indoor temperature range 0  ~ 50  32  ~ 122 Super Large LCD screen (5.12 x 3.15 inch) and big ,bold number display, blue backlight without blinding. Easy to Set Up and This Digital Alarm clock can be freestanding or hung on the wall Kitchen Timer Function