Product parameters:
1. Size: 41.5 mm (length) * 19 mm (width) * 15.3 mm (high)
2. Weight: 5 g
3. PCB color: Blue/Black
4. The power supply voltage: 2.5 to 6 v
5. Support the I2C protocol
6. Contrast can be adjusted, rotate blue potentiometer, clockwise, counterclockwise. Potentiometer design on the front, convenient customer adjust freely anytime and anywhere
7. The module can cascade, can cascade up to eight. Through the short circuit A0 / A1 / A2 modify device address. The default address 0 x27