Welcome to my store, I hope you have a great shopping experience here. We will keep updating a lot of new products, and there is definitely one for you. Item Name: Smart Nail Chip Operating Temperature Range: -50 Degrees-+80 Degrees Chip Type: Ntag213 Carrier Frequency: 13.56mhz Color: Translucent Waterproof Rating: Ip68 Features: Breathable, Skin-friendly, Flexible Rf Distance: 1~3cm Material : Metal Manual : english Size Details: 0.5cm x 0.1cm/0.2" x 0.04" (Approx.) Ingredients: dimethyl diisocyanate cross-linked polymer, simethicone Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Note: The mobile phone needs to have NFC function.How to use: First polish the nail stickers, stick the chip, and then apply the nail polish, you can use it. (The material of the N3 chip is relatively hard. It is recommended to choose a relatively flat nail surface and small curved fingers, such as a thumb). Package Includes: 1 x Smart Nail Chip 1 x Manual