- Sonic Alert Combination Alarm Clock - 113 dB extra-loud alarm with adjustable tone and volume control - Built-in receiver for other Sonic Alert signalers (Models SA101 SA201 RH100 BL300) - Lamp connection - Flashing alert lights - User selectable snooze time - 12 or 24 hour format - User selectable alarm duration - Maintains time and alarm setting in the event of power failure