Hello, my name is Rusty. Please stand by..
There is a little slot on the side. You'll need to flip it out to get to the battery.
Click here. Watch the video from 1:25 to 1:30, it shows you where the battery is. It's a standard 9v battery, and you can get them at almost any store.
Stand by just a minute, let me take a closer look at your exact model.
Ok, yours is still in the same spot as on the video, but you'll need to use a flat screwdriver to pry it open.
Don't rate, and you won't be charged for my time. You'll need to contact customer service for the refund, but we have a A+ rating with the BBB.