Compatible with Android phones only, not for iOS. Supports 5 frequencies: 125KHz, 13.56MHz, 250KHz, 375KHz, 500KHz. HID support is limited to ID frequency 125KHz; HID CLASS 13.56MHz is not supported. Supports reading and writing of IC 13.56MHz cards and ID 125KHz cards. Supports NFC mobile phone and smart bracelet simulation. Supports IC/ID card replication. Compatible with Android phones and computers; supports Windows 10-11 operating systems. Product appearance, color, and printed text may vary slightly between batches; these differences do not affect functionality. Color: Black. Material: Plastic. Package Contents: 1 x Smart Card Reader, 1 x Adapter (random color and appearance; specific color or style cannot be requested), 1 x Data Cable (random color; specific color cannot be requested). The package includes only the items listed above; other accessories are not included. Note: Lighting effects and display settings may cause slight variations in the color shown in images compared to the actual product. Measurement error allowance: +/- 1-3 cm.