1. Built-in high-frequency antenna corresponds to the antenna depth, eliminating blind spots and enabling uninterrupted reading of the entire data card. 2. Increased keystroke frequency allows the card to store more data. Data analysis is stable with a low error rate. 3. Low-frequency antenna improves signal-to-noise ratio for faster recognition speed, and the portable design meets various application needs. 4. No external antenna interface required—plug-and-play design for easy use and reduced risk of damage. 5. Simple and convenient lithium battery removal. (In offline mode, compatible with power bank use.) Material: PC + Metal Color: Black Package Contents: 1 x RFID Card Reader Note: Only the above items are included. Other products are not included. Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.