function of automatic polling, if the customer writes the access control into the device, the device can automatically recognize and open the door. Our small and versatile device can clone and emulate a wide range of RFID tags and cards. With This Device, you can create copies of RFID tags and cards, which can be used to access secure areas or equipment that require RFID authentication. You can also emulate and stores different types(125KHZ/13.56MHZ) of RFID cards. This Device is a valuable tool for anyone working with RFID technology, whether you're an , security professional, or just a curious hobbyist. And thanks to its compact and portable design, you can take it with you wherever you go!<br><br>Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Color: Black & Transparent Material: plastic<br><br>Package Contents: 1 x RFID Reader 4 x UID Keychain (Random color and appearance,Specified color and appearance are not accepted) 4 x UID Card 2 x Adapter(Random color and appearance,Specified color and appearance are not accepted,But the interface remains unchanged) 1 x USB Cable (Random color,Specified color is not accepted) 1 x Lanyard<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.