125 kHz, 175 Hz, 250 kg, 300 kg, 375 kg, 500 Hz, etc. Supports IC frequency: 13.56 MHz. Not compatible with Mac; this software is designed for Windows only. The default language is Chinese, with English available as an option in system settings upon startup. The blue card is a 125 kHz label, and the white T5577 125 kHz H-ID card is a blank label. These cannot be read or written to directly. Data must first be written, then copied using a 125 kHz RFID card. The blue 13.56 MHz UID keychain (Pattern 1) is an IC copy card that supports direct read and write functions. All cards can be rewritten multiple times. Supports most blank copy cards, including UID, FUID, CUID, ZXUID, EUID, ICUID, E5500, E5550, T5577, EM4305, EL8265, 5200, 7200, 8200. IC MF1 S50 TK4100 EM4100 is not supported. Supports IC, MF1, S50, ID, TK4100, H-ID26, H-ID35, H-ID37, 125 kHz to 13.56 MHz; supports some T5577 encrypted cards (this represents a significant technological advancement. Completion of this function is complex and requires card reader testing). When connecting to the computer: a disclaimer appears. Do not press the "OK" button or any button on the card reader at this time. Open My Computer, locate the removable drive, and copy the main software EXE file with the red logo from the flash drive to the computer. Double-click to open the software. Once USB connection is displayed, click Start on the screen. The process takes approximately 1–3 minutes. When successful decoding is indicated, replace with a blank card and proceed with copying as instructed. Color: As Shown Material: Metal + Plastic Package Contents: 1 set * RFID writer Only the above package content; other items are not included. Note: Lighting reflections and differences in display screens may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1–3 cm.