Comprehensive RFID Solution: The YRM100 is a powerful TTL UHF RFID reader and writer module It features an ESP32 interface, ensuring high compatibility and performance Integrated RFID Antenna: This module comes with an integrated RFID antenna, providing excellent range and reliability for RFID tagging and tracking applications Flexible Connectivity: Equipped with a TTL interface, the YRM100 offers versatile connection options, making it ideal for hobbyists and professionals alike in developing smart IoT projects 60 x 70mm (reading distance approximately 3 meters) (USB connector panel color: red or blue, sent randomly, specific colors cannot be specified) Due to different batches, there may be differences in product appearance and printed text, which not affect use Color: As Shown Material: PCB Package Contents: 1 * RFID UHF reader 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.