Condition: In box/Opened. Item still works. 2x C batteries are included

The main feature of the pet is that the bowl (or the tank) can be filled with water, and the owner can play with it by pressing the buttons, the owner is also required to change the water over time as if they were keeping a real animal.

The tank has a lid and contains a nest, a feeding area, two seaweed plants, and Mutsu's larvae. There is a light in the nest that lights up in sync with Mutsu's movements and cries.

Switch on the device and communicate with Mutsu using the three "meal buttons", the light sensor, and the sound sensor. If you do not operate the device for a while, it will fall asleep, but it will wake up by pressing the meal button.

There are friendship levels from 1 to 4, and a higher special level. The friendship level can be determined by the color of the light, which is orange at level 2, green at level 3, and orange and green at level 4 and above. When the friendship level is low, the pet does not leave the nest much and does not try to eat food, but as the friendship level increases, the pet's behavior patterns increase and it becomes more emotional, and at level 4 and above it starts to sing. If you do not take care of it, the friendship level will decrease.