Provide two-way communication capability VCCA side support voltage: 1.2V-3.6V VCCB side support voltage: 1.65v-5.5v Can provide 3.3-5V, 1.8-3.3v and other common level conversion capability Main applications: 5V and 3.3V MCU module 3.3V and 5V MCU module Compatible and other communications support MCU and card communication level conversion SCM and iic, spi serial device level converter Active high enable IO recommended by a low voltage side of the IO port Material:plastic colour:blue Package Contents: 5 * Converter Module 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.