Please note: Supports Android phones only, not for iOS. Supports 5 frequencies: 125KHz, 13.56MHz, 250KHz, 375KHz, 500KHz. HID currently supports ID frequency 125KHz only and does not support HID CLASS 13.56MHz. Supports reading and writing of IC 13.56MHz cards and ID 125KHz cards. Supports NFC mobile phone and bracelet simulation. Supports IC/ID replication. Compatible with Android phones and computers; supports Windows 10-11 systems. Due to different production batches, there may be variations in product appearance, color, and printed text, which 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 appearance cannot be requested) 1 x Data Cable (Random color; specific color cannot be requested) The package includes only the items listed above; other products are not included. Note: Lighting effects and display differences may cause slight variations in the color of the item as shown in images compared to the actual product. Measurement error allowance is +/- 1-3 cm.