About this item Door Type - Wooden | Swing | Door Thickness - 12 to 25 mm | Application - Drawer, Cabinet, and Wardrobe | Batteries - AAA (3 pcs) This lock is made from high-quality material and is designed to withstand the demands of a busy household, with superior construction that has been tested to ensure optimal performance. This lock is a 2-in-1 security marvel! It empowers you with the ability to register up to 20 Fingerprints and comes with a USB E-key for manual access. This lock is engineered with a focus on delivering optimal security, making it an excellent choice for a variety of settings, including homes, offices, institutions, and commercial spaces. Auto-locking - It ensures that the door is automatically locked once the door is closed. Low-battery Indicator - It alerts the user in advance in case the battery level is low so they can replace the batteries before they are completely drained. Emergency Battery Backup - If the battery is completely drained, the lock can be connected to a power bank through the USB port to regain access for a while.