Working frequency:125KHZ /13.56MHZ Battery:Lithium battery Power on:Automatic start and stop. Communication mode:TypeC/USB/Bluetooth APP:Open source Nfc tool. Decoding mode: Read card or Detect device. Note:don't support clone card. Already implemented: 1. Click the A button to switch the card slot to the right. If the card slot is not enabled, it will automatically skip and switch to the next 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 the 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. Colour:As Shown Material:Plastic Package Contents: 2 x RFID ChameleonU Smart Chip Reader Kit(Due to different product batches, the appearance may vary but will not affect the use)