This clock not only display 12&24hours time but also countdown from 99:59 to 00:00 or count up from 00:00 to 99:59. Function: Display 12&24 hours time Countdown from 99:59 to 00:00 Count up from 00:00 to 99:59 Reset to initial value Stop at anytime and continue to run from stopped time Features: Easy operate using remote controller Switch from time to countdown or count up alternatively by remote controller LED with 10 years lifespan Specification: Digit High: 6'' Time format: 12&24hour format Format: MM:SS ( MM for Minutes and SS for Seconds.) Control by wireless remote control Dimension: 25.6''L x 7.6'' H x 1.6'' D Case material: Aluminum Adapter: 110VAC to 12VDC Plug: US Standard Price Included: 1x AC/DC Adapter 2x brackets and screws 1x remote control 1x clock 1x user manual Remarks: Battery inside of remote may not include because of new forbidden policy of international delivery; You can buy it from your local market. Battery CR2025 3V If use outside, please do a cover when rain.