Mosquito killer Reliever Bite Helper Itching Relieve PenFeatures: Quickly therminates itch and irritation of mosquito bites. No more itch! Drug & Chemical Free, non toxic, gentle on skin, safe to use on adults and on kids over 4 years of age. Thermo pulse technology delivers heat & vibration to the affected area increasing localized blood flow and circulation,soothing the itch. Can be used for outdoor fishing, camping, traveling, living and other scenes. Small size, east to carry to anywhere you go.