Caremaxx doppler - no sound at all?

Tiffany

I bought a Caremaxx doppler and can't seem to get it to work. Firstly the instructions say a light should come on but there's no place for a light on the doppler in the first place.

Then when I turn it on, I hear that electric type buzz (like when you plug speakers in to a laptop) but then no sound at all. No electric fuzz, no stomach gurgling, nothing. The battery is new.

Is that normal or is it likely broken?