The K.O! Pocket Operator is a micro-sampler.
The built-in microphone and 3.5mm jack input can capture audio from a variety of sources and store it using the onboard memory. It can hold up to 40 seconds of audio, shared across the 16 available sample slots.
It has a micro sampler with 40 second sample memory and built-in recording microphone. Sample any sound source using line in or the built in microphone. Melodic mode lets you play chromatic melodies and drum mode lets you play drums. Sequence it all and add effects on top.