Thank you for viewing. I am selling this because I have replaced my iPhone. The included instruction manual is also included. *Please note that this is not compatible with iPhone 15 or later. --------------- Heat it is an insect bite treatment device that plugs into your smartphone's charging port. It treats the affected area by heating it to approximately 47-51°C for a short time. Current research suggests that applying heat weakens the transmission of the stimulus. It can be used when bitten by mosquitoes, horseflies, bees, and wasps. It's compact, so you can carry it with you on a keychain at any time. You need to install the smartphone app beforehand to operate it. Heat it Lightning (Compatible with Lightning connector iPhones 6s-14) Size: 17 x 38 x 8mm (including protective cap) Weight: 5g ■ Easy operation, treatment completed in 4-10 seconds ■ Can be used by the whole family (3 years old and up) ■ No medication used - sustainable ■ Can be used up to 1,000 times with a fully charged smartphone ■ Quality control certified by TÜV SÜD ■ Portable on a keychain (small, lightweight, and convenient to carry) ■ Made in Germany