Working frequency: 125KHZ/13.56MHZ Battery: Lithium battery Power on: Automatic start and stop Communication mode: Type-C/USB/Bluetooth APP: Open source NFC tool Decoding mode: Read card or Detect device Color: Black Material: Plastic Already implemented: 1. Click the A button to switch the card slot to the right. If the card slot is not enabled, it automatically skips and switches to one. 2. Click the B button to switch the card slot to the left, and other features are the same as above. 3. In the sleep state, press and hold the B button, insert the data cable, and then release the B button to enter UPDATE mode. Tip: When the color of the card slot is red, the card slot is enabled with IC simulation + ID simulation at the same time. When the color of the card slot is green, the card slot only enables IC card simulation. When the card slot color is blue, only ID card simulation is enabled for this card slot. Note: The colors of USB cables, adapters, and keychains are random; do not expect a specific color. Package Contents: 1 x Smart Chip Reader 1 x USB cable 1 x Adapter 1 x Keychain Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.