Features: Strong anti-interference ability: advanced anti-interference technology can work stably in complex environment and ensure reliable data transmission. Small and light design: the module is small and easy to be embedded in various devices, saving space and simplifying design. A variety of power supply option: support a wide working voltages (3.3V-5V), suitable for different power supply configuration, and increase the flexibility of use. User-friendly documentation: Detailed user manuals and development documents is attach to help users get started quickly and realize various functions. Perfectly suited for secure payment processing, contactless access management, logistics tracking across industries. Specifications: Component:Plastic Model: CLRC663 Full Protocol Card Reader Module (13.56MHz Full Protocol) Card Reading Distance: 0-7cm Working current: 50mA No load current: <10mA Main Voltages: 3.3-5V Support Card Protocol: TypeA/B 15693 Size:Approx.3.9x6cm/1.54x2.36inch Package Includes: 1Pc Development Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.