Fitness watch WITHOUT Bluetooth?

Hey all!

I am looking for a watch that can track my approximate calorie burn all day long so I can set goals to burn more every day. It doesn't need to be perfectly accurate because it is just a goal setting thing for me. However, it cannot have bluetooth or send any kind of signal. I work in a restricted space and no cell phones, Bluetooth devices, PDAs, or cameras, are allowed in the space. I want to be able to wear it at work because I am there for 13 hour long days at a desk and I want an idea of what I am burning on my shifts as well as outside of work. Any suggestions are appreciated! Thank you~

Cheers!
Hannah