1. Support ISO18092, ISO14443A, ISO14443B, ISO15693, FeliCa and other protocols2. Using differential antenna design, the output can reach 1.4W, and the sensing distance is .-in low- capacitive sensor, supports induction and capacitive wake-up, and can sense the presence of a card without turning on the magnetic field of the card reader.3. The onboard STM32F103RBT6 controller is convenient for direct learning and evaluation or development and integration, no need to other main control boards4. Onboard 1.3-inch OLED screen, convenient for users to operate visually. Onboard SRAM memory chip, no afraid of insufficient internal RAM. Onboard -SD card slot, external TF card can be used to store NFC data to be transmitted.5. There are four buttons and two user indicators on the board, which is convenient for users to debug. Onboard download interface, serial port debugging interface, and lead out the unoccupied IO port, which is convenient for users to other devices. Matching customized acrylic shell, one more layer of protection, beautiful and dust-proof. complete supporting manuals and sample programs[My parameters]:NFC chip: ST25R3911BWorking frequency band: 13.56MHzOutput : 1.4W (max)Communication interface: SPIsupporting agreement:ISO18092 (NFCIP-1) P2PISO14443A, ISO14443B and FeliCaISO15693Other standard and custom protocols (such as Classic)Supply voltage: 5VWorking voltage: 3.3VProduct size: 105.5 x 66 x 17.6mmMaterial: PCBcolour: bluePackage Contents:1 x ST25R3911B NFC development boardOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.