Mikroe Volume 2 Click is used for complete digital volume control. The board features the NJRC NJU72341 2-channel I2C configurable electronic volume IC with external mute control. It controls two independent low distortion audio channels with a vast volume control range from 0 to 95dB. It also has a range of 1dB step offering zero-cross detection to protect pop noise. It operates with a simple I2C serial interface that accepts 8-bit data offering low distortion and noise.