Acctim Clocks Lexington Digital Alarm Clock LED display with mirror lens and adjustable brightness. Crescendo alarm with snooze and Indoor temperature display. Battery or USB powered (lead supplied) Depth: 4 CM LED display with mirror lens and adjustable brightness Height: 9 CM Width: 8 CM Crescendo alarm with snooze Indoor temperature display Battery or USB powered (lead supplied) Requires 3 x AAA battery (not included)