The Reizen Big LCD Display Talking Alarm Clock is a low profile, multi-functional talking alarm clock that announces time in a friendly female voice with a touch of a button. This low vision talking alarm clock measure 1-3/4 round and accented in dark gray. Only the lightest touch is required to activate the voice announcement button. Another special feature of this low vision alarm clock is the Lock/Set button. Those who are blind or have low vision, perhaps even those with dexterity problems, may already be familiar with the frustration of accidentally resetting a digital clock's time or alarm. The Reizen Big LCD Display Talking Alarm Clock features a button that you push to set only when you are purposely setting the clock's time or alarm. When finished, push the button to Lock and you never have to worry about accidentally changing the time or the alarm again. This talking clock also features a 10-minute snooze, your choice of beep, cuckoo or rooster alarm sounds, hourly voice announcements, and Hi/Lo volume sound. Clock requires two AA batteries; not included. Measures: 4-1/4 diameter and 2 high. Large LCD Display measures almost an inch tall.