Features: 1. Smart Nail Sticker: NFC Smart Nail Sticker Is A High-Tech Smart Product That Can Be Used For Access Control Cards, Bus Cards, Etc. Release Light. 2. Embedded Smart Led , Embedded Smart Led Adopts Mobile Near Distance Communication Technology (NFC ), No Battery In Nail Sticker. 3. Simple Operation: The Smart Nail Patch Function Is Very Simple. As Long As You Use An Nfc-Enabled Phone, Your Nails Will Glow. 4. Multifunctional, In Addition To Mobile Phones That Can Make Fake Nails Shine, There Are Many Other Electronic Devices Equipped With Nfc Function. 5. Fashionable And Special Nail Stickers, Popular Among Girls, Fashionable And Special. 1. Size: 0.7 x 1.1cm 2. Function: Can Be Used With Other Nail Products 3. Instructions For Use: First, Check Whether Your Mobile Phone Supports Nfc Function. Taking Mobile Phone As An Example, Turn On The Mobile Phone And Find (Settings--More Connection Methods--Find Nfc--Then Open); System-Only For Now 6 Only Has Nfc, But Has Turned Off Nfc, And Will Automatically Turn On The Nfc Function After Upgrading The Latest System. 4. NFC Nail Sticker Operation Steps: Step1: Clean And Trim Fingers, Apply A Layer Of Transparent Nail Polish; Step2: Open The Package And Take Out The Nfc Nail Sticker, Uncover The White Paper On The Back Of The Nfc Nail Sticker, It Is Recommended To Stick The Nfc Chip On The Index Finger; Step3: A Piece Of Nail Sticker You Like; Step4: On The Chip Of The Nail Sticker, And Expose The Led Light; Step5: Apply A Layer Of Transparent Nail Polish On The Nail size: 0.7 x 1.1cm Material: Plastic+FPC+copper colour: yellow Package Contents: 5 x LED Nail Light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.