3.3V & 5V TTL Logic Level Converter Module This module allows to use 3.3 V sensors on a 5 V microcontroller. Features Breadboard compatible Specifications Low side (3.3 V): 2 inputs and 2 outputs High side (5 V): 2 inputs and 2 outputs Other connections: Vlow (3.3 V), VHigh (5 V), pass-trough GND Dimensions: 0.59" x 0.63" x 0.59" (15 x 16 x 15 mm) Difficulty: Level 3 (intermediate)