Most electric clocks include a basic alarm and snooze; many also offer adjustable snooze timers and dual-alarm capability for setting two separate alarms.
Some bedside electric clocks include a built-in USB charging port so you can charge a phone or small device beside the clock; listings sometimes specify ports rated around 2 A.
Many models include brightness controls or dimmer options—ranging from simple high/low settings to multi-level adjustable brightness, with some listings showing three distinct brightness levels.
Sizes range from compact bedside units up to large wall clocks (about 3.35" to 26" in height/diameter), and several bedside models advertise jumbo LED digits—typically around 1.8" high—for easier reading.
Battery backup preserves the clock’s time and alarm settings during power interruptions and restores them when power resumes; many models list optional backup batteries such as a 9‑volt, two AAA cells, or a CR2032 button cell.
Kids’ electric clocks often function as sleep trainers using light or facial cues, include multi‑color night lights, soothing sleep sounds and nap timers (silent or audible), and note safety/approval marks in product details.
Most listings are for nightstand or tabletop bedside alarm clocks, while a smaller number are larger analog wall clocks designed for indoor wall display.