This Reizen Braille Quartz Alarm Clock was developed especially for the blind and those with low vision, but also the deaf and hard of hearing. Easy-to-read and use with large, oversized buttons. Durable metallic taupe plastic case with a removable clear plastic cover and chrome colored trim. Black face with glow-in-the-dark white hands and a tactile dial with raised Braille numbers for easy identification. The alarm sets with a large, notched dial on the back of the clock. Alarm sound is a steady series of beeps. Turn the alarm function on or off with a large button on the side of the clock. Snooze button at the top of the clock gives you a few extra winks when the alarm has gone off, or press snooze at any time to activate the light for more illumination to the dial. Sturdy enough for everyday at-home use and portable enough to take with you when traveling. Plug in the vibrator and the adapter (the vibrator depends on the adapter for power) and this clock will wake hard of hearing or deaf individuals without waking your partner. Works well as a reminder also. This is a wonderful clock that's very helpful for the deaf/blind person. Measures: 4 high x 3-3/4 wide x 1-3/4 deep. Uses a 1-AA battery, included.