ThermaCELL MR300G insect repeller, olive drab

The Finnish summer is beautiful - neversetting sun, lush green nature, local populace plastered senseless for the whole two months of it and the air is full of blood-sucking little insects.

ThermaCELL is among the best possible solutions against mosquitos - a portable thingie that gives you some 5x5 m mosquito-free area anywhere you go.

Operating principles

The device works by using butane to heat a pad, which releases D-allethrin into the air. There's no open flame involved, just a bit of warmth. It doesn't kill mosquitoes, but repels 98% of them from a 5x5 metre area.

Full effect and coverage is achieved 10-15 minutes after turning on. Wind and rain reduces effect, but insects don't like these either. In case of a breeze you can place the ThermaCELL upwind and close to the ground. Just keep in mind there's invisible stuff coming out and common sense helps you place the device optimally.

One pad is good for 3-4 hours and a butane cartridge for 9-12 hours of operating. Turn off to stop the gas flow entirely and the pad will also last longer.

Factory new, made by Thermacell.