Blue, Thermacell Mini Mosquito Repeller, Effectively Repels Mosquitoes By Creating A 15' Zone Of Protection, Compact, Easy To Use & Stylish Device Will Look Great On Any Patio Or Deck While It Works To Keep Pesky Mosquitoes From Biting & Bothering Your Guests, For Refill Cartridge Use TV #876-557, TV #672-412 Or TV #217-236.