Features: 1. Practicality: This product can get up to 8 same-address I2C devices hooked up to one microcontroller,acts as a gatekeeper, shuttling the commands to the selected set of I2C pins with your command. 2. Easy to operate: the multiplexer itself is on I2C address 0x70 (but can be adjusted from 0x70 to 0x77) and you simply write a single byte with the desired multiplexed output number to that port, and bam - any future I2C packets will get sent To that port. 3. Easy to install: The product is easy to install and can be used directly on the motherboard. 4. The compatibility is good: The chip itself is 3V and 5V compliant so you can use it with any logic level. 5. Easy to carry: This product has a portable size so it is very easy to carry. Descriptions: This product is small in size, safe and reliable, and cost-effective. It can be up to 8 same-address I2C devices hooked up to one microcontroller. Specifications: Color:purple Product Type: Driver IC Package: electrostatic bag package Goods number: 23270 Model: TCA9548A Package Included: 1 x 8 way IIC multi-channel expansion board module