The mosquito bite killer is made of natural quartz crystal, no battery power, safe and healthy, fast antipruritic, no medicine or chemicals. Just press the button. top button when in use, and it releases a small amount of current to quickly relieve discomfort caused by mosquito bites, hives and other insect bites. The product does not cause allergic reactions and avoids scratching the skin and causing inflammation and scarring. How to use: Align the pruritic device with the mosquito bite. Press the button - Adults can reduce itching by pressing 5 times, 12 times to reduce swelling, and children can reduce the appropriate amount. Small and portable, does not take up space, can be carried in the bag, perfect for home, travel, outdoor camping.