Sentry Industries HR100 is a sound-box AM/FM radio with an alarm clock. It comes with an AUX input, allowing you to connect your MP3 player or other portable audio devices. The radio also has a headphone jack for private listening.

The alarm clock has a snooze feature and can be set to play the Happy Birthday song on a specific date and time. The clock also has a backlight for easy visibility in the dark.

The HR100 is powered by AC power or by two AA batteries, ensuring that the clock keeps accurate time even in the event of a power outage. The radio has a built-in speaker with an impedance of 8 Ohms and a power of 5W, providing clear and powerful sound.