1. Support ISO18092, ISO14443A, ISO14443B, ISO15693, FeliCa and other protocols 2. Using differential antenna design, the output power can reach 1.4W, and the sensing distance is longer.Built-in low-power capacitive sensor, supports induction and capacitive , 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 connect other main control boards 4. Onboard 1.3-inch OLED screen, convenient for users to operate visually. Onboard memory chip, no longer afraid of insufficient internal RAM. Onboard Micro-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 connect other devices. Matching customized acrylic shell, layer of protection, beautiful and dust-proof. Provide complete supporting manuals and sample programs [My parameters]: NFC chip: ST25R3911B Working frequency band: 13.56MHz Output power: 1.4W (max) Communication interface: SPI supporting agreement: ISO18092 (NFCIP-1) Active P2P ISO14443A, ISO14443B and FeliCa ISO15693 Other standard and custom protocols (such as Classic) Supply voltage: 5V Working voltage: 3.3V Product size: 105.5 x 66 x 17.6mm Material: PCB colour: blue Package Contents: 1 x ST25R3911B NFC development board Only the above package content, other products are not included. Note: Light 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.