Features: _x000D_ If you've ever tried to connect a 3.3V device to a 5V system, you know what a challenge it can be. The CJMCU 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. _x000D_ _x000D_ This level converter also works with 2.8V and 1.8V devices. _x000D_ _x000D_ What really separates this Logic level converter from our previous versions is that you can successfully set your high and low voltages and step up and down between them safely on the same channel. _x000D_ _x000D_ Each 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. _x000D_ The level converter is very easy to use. The board needs to be powered from the two voltages sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the 'H V' pin, low voltage (3.3V for example) to 'L V', and ground from the system to the 'GND' pin. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Channel: 4-channle _x000D_ Voltage: 5V, 3.3V _x000D_ Size: 2*1.7cm/0.79*0.67in _x000D_ Weight: 3g(approx.) _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 1 x Module _x000D_ 2 x Pin Headers