ThermaCELL Backpacker camping mosquito repellent device Special new device from ThermaCELL especially for campers and world travelers. The device can be threadedly connected to the gas cylinder used for a standard camping stove. How to use: Connect it to the camping gas cylinder with a standard thread, shake the bottle carefully, switch the ThermaCELL Backpacker to the ON position and leave it for approx. for 10 seconds, so that the gas passes through the device, then press the piezo ignition (spark) 3-4 times to start the device. The ThermaCELL Backpacker comes with 3 mosquito repellent ThermaCELL tiles (enough for 12 hours). The device can even be carried on airplanes in hand luggage. (butane bottle not included!)