Features： 1、Simpler Works: The multiplexer is at I2C address 0x70, which can be adjusted from 0x70 to 0x77, you just write a single byte with the desired multiplexed output number to that port, and bam any future I2C data packets will be sent to this port. 2、Great Control: You can use 8 of these multiplexers at each 0x70‑0x77 address in order to control 64 identical I2C addressing sections. 3、Wide Matching: Compatible with 3V and 5V, so you can use it with any logic level, very practical, reliable and efficient. 4、Practical Use: Connect up to 8 I2C devices of the same address to a micro controller and route commands to a selected set of I2C pins. 5、Easy to Install: Comes with 5 sets, and each set has 2pcs pin header, can also be plugged into a solderless breadboard. Specification： Item Type: Development Board IIC Address: 0x70 - 0x77 Frequency: 0 to 400kHz. Channel: 1 to 8 channels. Resetting: Power on reset. Package List： 5 x Development Board 10 x Pin Header