1.5'' 6Digits LED Countdown Wall Clock Escape Room Public Talk Church Timer Functions: 12/24 hours time format, countdown/up in hours minutes seconds and minutes seconds hundredths Countdown: Countdown in hours minutes seconds or minutes seconds hundredths; Count up: Count up in hours minutes seconds or minutes seconds hundredths; Time of day: Display 12 and 24 hours time format Control by wireless remote and you can buy an external 5V battery to power without outlet