ThermacellRechargeable Mosquito Repeller Refills; Advanced Repellent Formula Provides 20 Foot Protection Zone; Compatible with Thermacell E-Series & Radius Only; No DEET, Spray or Flame

I live in a very heavily wooded area with a ton of mosquitoes. I like to host outdoor gatherings in my backyard, but I hate having to wear bug spray or risk getting mosquito bites. Consequently, I bought thermacell a few years ago and have been absolutely thrilled with the results! Since purchasing it, my family and I have been able to comfortably sit outside on summer nights without wearing bug spray and have not gotten bitten once! Thermacell repellent is safe, effective and affordable. The refill cartridges last a long time and are very easy to insert and remove. I highly recommend them and will continue to buy and use them year after year.

Easy to install. Great system. Bugs stay away from us with this cute little machine.

Overall Impression:The device generally works as advertised, but it comes with a few limitations that buyers should be aware of.Pros:It does function effectively when used properly.Emits a smoke line that’s odorless, which is a nice touch.Cons:The included cartridge lasted only about one charge, which was disappointing.Battery life is limited — expect to charge it daily if you're outside for more than two hours.You need to power it on at least 10 minutes before going outdoors for it to be effective.Replacement cartridges can be pricey, though I was able to find larger, more affordable ones elsewhere (over 60% cheaper).Final Verdict:While it works, be prepared for frequent charging and ongoing costs for replacement cartridges. Consider looking for third-party cartridges to save money.

Works. Cannot attest to a 20 square foot radius, but it does work great when close by. I got about 25 hours out of a cartridge, but another reviewer claims that if you put the little blue cap back on when it's not in use, it lasts longer, so I started doing that. Mosquitoes hate this stuff, I was getting swarmed until I turned it on and they *poof* all of a sudden disappeared. Needs to be charged up every 10 hours or so, good little gadget.

The Thermocell changed our outdoor experience. As long as we have plenty of the Thermocell refills I don't have to worry about my grandchildren, my family being eaten alive by pesky mosquitoes. These refills last for hours. I highly recommend it and will continue to buy it. You can place the thermacell anywhere and it's guaranteed to work. Since we've had these we no longer get bitten by mosquitoes.

Works great! Use it while hunting and not one mosquito bite.

Too expensive but do work. Won’t buy again.

It's not 100% effective but I think its pretty close.