A Therma Vell is a mosquito repellent device..It operates on a butane cartridge and a little blue mat ..that burns slowly..It keeps mosquitoes away. They can be purchased at almart..
The plasic device is about 8 inches long ...and a butane last about12 hours..the mats last about 3 hours..
THE device cost about 22.00
A box of 3 butanes and 12 mats about 20.00
Not cheap but just about every hunter uses them in Florida.
http://www.mosquitorepellent.com/
