SINCEDA Large Screen LCD Display Nightlights Circumstance Temperature Monitoring Function Battery Operated Alarm Clock (Black) Large LCD displays time ,calendar, temperature, alarm status Dimension: 13.5 cm * 7.5cm * 4.5cm Battery Operated Alarm Clock -- Without thinking about power goes out and wires, it can be placed whatever room you need, perfect for travel and beside use. Requires 3 AAA Zinc-carbon batteries (Not INCLUDED)