Function of automatic polling: if the customer writes the access control data into the device, the device can automatically recognize and open the door. Our compact and versatile device supports cloning and emulation of various RFID tags and cards. With this device, you can create copies of RFID tags and cards for authorized access to secured areas or equipment requiring RFID authentication. It supports emulation and storage of multiple RFID card types (125 kHz and 13.56 MHz). This device is a useful tool for professionals and hobbyists working with RFID technology. Its compact and portable design allows for convenient use anywhere. Due to manufacturing variations, there may be slight differences in product appearance, color, and printed text — these do not affect functionality. Color: Black & Transparent Material: Plastic Package Contents: 1 x RFID Reader 5 x CUID Keychain (random color and appearance; specific color or appearance cannot be guaranteed) 5 x CUID Card 2 x Adapter (random color and appearance; specific color or appearance cannot be guaranteed; interface remains unchanged) 1 x USB Cable (random color; specific color cannot be guaranteed) 1 x Lanyard Only the items listed above are included. Additional accessories are not included. Note: Lighting conditions and display settings may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.