alarm clock radio

Most alarm clock radios are primarily plug‑in units; many include a built‑in battery backup to preserve clock and alarm settings during power outages. Other designs use replaceable AA batteries (commonly 2 AA or 4 AA) or an internal/non‑standard lithium‑ion battery. A few listings show models that rely on mains power without any battery backup.

Common connectivity includes Bluetooth audio streaming and AM/FM radio. Many models also offer a 3.5 mm auxiliary input, USB charging ports, and -- on smart models -- Wi‑Fi. At least one model in the data supports micro SD playback.

Displays are typically digital (LED) with adjustable brightness or dimmer settings. Many models let you choose multiple brightness levels or turn the display off entirely to reduce nighttime glare.

Certain models include built‑in voice assistants and voice‑control capabilities, with smart‑home integration and multiroom audio support on compatible devices. These units may offer hands‑free voice commands for alarms and basic smart‑device control.

Alarm clock radios range from very compact bedside units to larger tabletop systems. In the data the listed heights span about 2.48 inches up to 11.42 inches, and weights range from roughly 1.23 ounces to 3.6 pounds, so you can find both pocketable and heavier tabletop options.