5 Pieces 4 Channel Bidirectional Logic Level Shift Converter 3.3V-5V for It is a small device that safely steps down 5V signals to 3.3V AND steps up 3.3V to 5V at the same time You can successfully set your high and low voltages and step up and down between them safely on the same channel It can convert 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side Logic level shifter Bi-Directional with 4 channels between high logic and low logic Compatible with breadboard, can be directly use in breadboar Specification: For example: High voltage is 5V, low voltage is 3.3V HV connect with 5V power supply connect with 3.3V power supply GND connect the power negative pole LVx input/output 3.3V TTL HVx input/output 5V TTL Bi-Directional transform between LVx and TVx Small module with 1.3cm X 1.5cm With 2 rows of 6 pin This level converter also works with 2.8V and 1.8V devices High voltage (5V for example) to the 'HV' pin, low voltage (3.3V for exa