cd player with clock
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Many models use a small battery backup or an internal supercapacitor to preserve the clock and alarm settings when mains power is lost; the main unit typically runs from the included 120V AC adapter.
Most play standard audio CDs and recordable discs (CD‑R, CD‑RW). Many also support MP3 files burned onto discs.
Common options include Bluetooth and auxiliary (AUX) inputs for streaming, plus USB ports used for MP3 playback or device charging; some units list a dedicated USB charging port (for example 2.1A).
Most include AM/FM tuners with digital or PLL tuning and multiple station presets. Preset counts vary across models (examples range from about 14 presets up to 20 AM + 20 FM presets).
Common wake sources are the radio, a CD, a USB audio source, or a built‑in buzzer. Many units let you select different wake sources for each alarm.