Features: Common level shifting capabilities such as 3.3-5V, 1.8-3.3v, etc. Main applications, 5V microcontroller and 3.3V module, 3.3V microcontroller and 5V module, etc. Level conversion of single chip and SD card communication MCU and iic, spi serial device level shifting enable IO is active high, it is recommended to connect IO port on low voltage side : Module using chip: TXS0108E High-speed full-duplex 8-channel level conversion module Provide two-way communication capabilities VCCA terminal support voltage: 1.2V-3.6V VCCB terminal support voltage: 1.65v-5.5v Due to different batches, there may be differences in product appearance and printed text, which will not affect use Material: PCB colour: As shown Package Contents: 10 x 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.