Covert, plain and simple.
they have several models and options in any price range you want starting at less the $100. I have 4 of the cheapest ones MPE-5's and they are excellent simple cameras that have pre set options. If you step up in prices you get a few more features and more choices in how to set the camera up. I have 5 or 6 of the MP6's/MP8's and a few of the older Red 40's. All have been great, even if i have had a problem they have the best customer services in the business. Have sent a few in over the years and they send me the current model brand new.
The battery life is excellent in all models, some of my batteries have to be close to a year old running the cheaper Rayovacs, they all take anywhere from 8-12 AA's. Some of my cameras are out from Jan-Sept and some or out May-Sept. You can find these cameras on sale through out the year for great prices. I have a bushnell, moultrie, and a buddies Luepold (its never been worth the plastic its made with). The moultrie is an old C battery camera but it still chugs along. The bushnell has been a great camera but doesnt compare to the value of the Red 40's i have and they are comparable in features.