KNACRO 8-Channel 5V/3.3V IIC UART SPI TTL Bi-Directional Logic Level Converter 8-channel high-voltage and low-voltage logic bidirectional logic conversion, two-way conversion between Ax and Bx. Conversion level range: 1.8V-6V. Module size: 28mm X 27.5mm. Weight:3.3g/0.12oz.