Working frequency: 125 kHz / 13.56 MHz Battery: Lithium battery Power on: Automatic start and stop Communication mode: USB Type-C / Bluetooth App: Open-source NFC tool Decoding mode: Read card or detect device Note: Card cloning is not supported Features: 1. Press button A to switch to the next card slot. If a slot is disabled, it automatically skips to the next enabled slot. 2. Press button B to switch to the previous card slot. Behavior is identical to button A. 3. To enter firmware update mode: while in sleep state, press and hold button B, connect the USB cable, then release button B. LED indicators: - Red: IC + ID simulation enabled - Green: IC simulation only - Blue: ID simulation only Color: As shown Material: Plastic Package contents: 1 x RFID ChameleonU Smart Chip Reader Kit (appearance may vary slightly between batches; functionality remains unchanged)