vibrating alarm clock

Most models run on AC (120V) or USB (DC 5V) power and also support battery operation. Listings commonly show a DC 5V/USB or 120V AC adapter for continuous power, plus battery options such as 2×AA, 3×AAA and a CR2032 backup cell.

Vibration is delivered either by a bed shaker or an under‑pillow vibration pad. Some clocks include a wired shaker, while others provide a round vibration pad designed to be placed under a pillow.

Several models include battery backup to retain time settings and/or keep alarms working during power outages. Examples on listings include a CR2032 backup cell or the option to use AAA batteries as backup.

Common wake modes are audible ringtone, vibration‑only, and combined ringtone plus vibration. Some models also offer radio wake and a mute setting.

Many have LED or digital displays with adjustable brightness. Typical options include two brightness settings or automatic/night dimming to reduce glare in the dark.

Most include a snooze button (commonly 5 minutes) and support repeat‑delay cycles—meaning multiple successive snooze intervals (for example, three 5‑minute delays). Many units also offer multiple alarm groups or dual alarms and day‑based scheduling (workday/6‑day/7‑day modes).

Some units offer adjustable vibration intensity (commonly three levels) and deliver vibration via a wired vibration pad or an external bed shaker/remote.