This is a injection plastic and metal radio or remote-controlled aircraft model kit.
Keyence is best known as a maker of high-end sensors and other equipment for many different industries. Their staff also likes to have fun and designs "toys" as a side-line. And what a toy this is. The worlds smallest radio-controlled indoor helicopter. We will just cover the key points:
Super lightweight - 100 grams!
Amazing hovering ability from a free-gyro sensor
Gyro sensor and dedicated electronics circuits allow independent 4-channel (vertical, rotation, backward/forward, left/right) control
Optional switching power supply makes long flights (about 30 minutes) possible
Main rotor and body made from Styrofoam. One rotor set comes with kit.