No chemicals: The insect bite healer application only works with heat and without chemicals, accelerates the healing of insect bites and stings and relieves itching and swelling, making it safer, more reliable and non-allergic. Electronic bite healer is suitable for infants and children over 4 years old, suitable for pregnant women. You and your family can use it safely. Electric insect bite healer: Insect bite healer built-in rechargeable 200 mHA lithium battery, powered by USB charging cable. After charging for 30 minutes, the electric insect bite healer can be used 100 times - it is more environmentally friendly. Treatment of itching: The bite healer is applied locally to an insect bite and helps to prevent itching and swelling and thus speed up healing. By applying targeted heat to the affected area, itching and swelling are relieved and the symptoms are improved. Pleasant healing process: Mosquito bite heat pen bite healer uses thermal frequency pulse technology with linear motor vibration massage to increase local blood circulation and relieve itching. Two modes: Click on the child mode once, it stops automatically after 4 seconds; double-click on the adult mode, it stops automatically after 6 seconds. Remove the insect bite healer from the affected area immediately if the heat becomes uncomfortable. Small & portable: The insect bite healer is small and handy, simple design that fits in any handbag and is ready for use anywhere, e.g. garden, at home, sea beach, camping, travel, etc. Heat pen against mosquito bites is a must for outdoor activities.