Feature: 1. Intelligent Card: Highly sensitive induction, waterproof, strong, and shockproof. Made of ABS eco friendly material for safety and durability. Contains smart chip and premium copper wire for sensitive induction. 2. For Tuya TTlock IC Card: Compatible with multiple locks, each card can be matched with multiple locks. Please note that remote keys can only be used for smart locks that support IC card function. 3. Smart Access Control: Integrated with smart technology, allowing interaction with access control systems for management and control. Features quick, safe, and convenient access, replacing traditional keys or password systems to enhance efficiency and security. 4. Versatile Application: Widely used in residential areas, attendance systems, parking lots, enterprises, schools, malls, and more. An essential component of modern access control management systems. 5. Enhanced Security: Improves door access efficiency, increases safety, and convenience. Size is 50x30mm. Frequency is 13.56Mhz. Compatible with smart locks. Specification: Item Type: IC Card Material: ABS Application: for Smart Locks Product Size: Approx. 50x30mm / 2.0x1.2in Gross Weight: 128g/4.5oz Frequency: 13.56Mhz. Package List: 20 x IC Card Note: All data are measured manually, and there are certain errors in the measurement results.