Equity by La Crosse 30240 Super Loud LED Alarm Clock Digital alarm clock with side speakers for extra loud alarm; with 70-decibel low or 95-decibel high volume setting black casing with silver speaker; time in .9-inch red LED digits with PM and alarm-on indicator lights Repeating 9-minute snooze feature; AC-powered with battery back-up option Measures : 5.25 x 1.70 x 2.85; requires separate purchase of 9-volt battery Battery backup