Important Tips:RFID cabinet lock can be opened by RFID cards provided, or smartphone with NFC function by using a trick. If you are looking for a cabinet lock that can be accessed by smartphone for sure, we recommend you the Bluetooth APP version cabinet lock.If your phone is NFC card copying supported, you can copy/add the existing RFID user card to your smartphone"s wallet and then use it as a cloning access card.You can also get/add a digital transit card to your smartphone"s wallet, and then you can program this digital transit card to the RFID lock as a new NFC user card. (Reminder: some transit cards may not work due to the regional restriction on smartphone NFC cards.)For IOS users, due to the regulation on Apples NFC policy, mostly all available transit cards in the Apple Wallet send dynamic signals every time you tap it. Therefore, your iPhone can access the RFID lock only if you can add/recharge one of the Chinese transit cards which are available in your Wallets transit card list since those cards send constant signals.Use 4 AAA alkaline batteries as the only power supply, when the battery-low beeping alert sounds, please replace the batteries ASAP.Please check if the RFID cards and the lock work properly before any installation after you receive the package.Various Application Scenarioshidden RFID lock can be applied to wooden cabinets, drawers, wardrobes, lockers, boxes, gun boxes, liquor cabinets, etc.The lock parts can be installed in different direction depending on different application scenarios, horizontally or vertically.This RFID cabinet lock can be also applied to double door cabinet by installing a double door clip. (shown on the picture above and included in the package)DIY installation for your own preference.Useful Tips: you can prepare some tapes for positioning the parts temporarily during installation.Installation Example for Wooden DrawersStep 1:As shown, move the lock buckle to the back of the drawer door just to measure the distance , and use a card to mark the distance. The buckle does not need to be screwed at this point.Step 2:Use the marked card and draw a line to the position shown on the picture inside the cabinet. This is for positioning the lock case. Step 3:Position the lock case to the cabinet as shown. We recommend you to use a tape to position it temporarily first just in case of any mistakes, you can install it to the drawer with screws later on.Step 4:Put the lock buckle with the lock case together as shown, and stick a tape to the back of the buckle.Step 5:Close the drawer and let the buckle stick to the back of drawer door, and then unlock it and reopen the drawer. Make sure that the buckle is already stuck to the drawer door at this point.Step 6:Positioning is done at this point, you can install the lock buckle and lock case to the drawer with screws.NFC Function Setup on Android Smartphone (Only if Card Copying Supported)Step 1:Open the wallet/payment app that comes with your phone. Find and click options like "Key Clone" or "Card Key". Then, click "Add" or "Copy New Card" to clone the access card.Step 2:Place your actual access card to the NFC sensor against the back of the phone and wait for the cloning/copying process to be completed.Step 3:After cloning/copying the access card to the phone, place it against the lock to check if it works.Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days.When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specificationsWe want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you.Thank you for choosing our product. We hope you enjoy it Note: 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.