It can bidirectionally transfer with 4 channels between high logic voltage and low logic voltage.
The bi-directional logic level converter is a small device that safely steps down 5V signals to 3.3V and steps up 3.3V to 5V at the same time.
Each logic level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side.

Instruction:
Take the high voltage (5V) and low voltage (3,3V) for example.
5V connects to HV pin;
3.3V connects to LV pin;
Ground from the system connects to GND pin.

Package Includes:
10× 3.3V-5V 4 Channels Logic Level Converter Bi-directional Shifter Module
20× Single Row Pin Header(6 pins)