Working frequency:125KHZ /13.56MHZ Battery:Lithium battery Power on:Automatic 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 automatically skip and switch 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, and hold the B button, insert the data cable, and then release the B button to enter the UPDATE mode: 1. System startup animation 2. USB wake-up animation 3. BTN wake-up animation 4. FIELD wake-up animation 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. The printing/appearance from batch to batch, but it not affect the use; the actual product may have color difference due to different light or display. Colour:Black Material:plastic Package Contents: 2 x Smart card Reader 2 x USB cable(Random Color, no specified colors are accepted) 4 x Adapter(Random Color, no specified colors are accepted) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.