Portable device with fish finder function. - Model name: Pocket Sonar - Colors: Blue/Yellow - Features: Equipped with a fish finder function - Accessories: Main unit, sensor This is a Pocket Sonar for the Game Boy. You could play mini-games on the Game Boy. The fish finder function (sonar) has not been confirmed. The power lamp lit up with 4 AAA batteries. Batteries are not included. Please prepare them separately. The inside of the battery box is clean, with no rust or leakage. The box has some minor damage. Everything in the pictures is included. I am a non-smoker. I do not have any pets. Shipping method: Anonymous shipping, Rakuraku Mercari Delivery Thank you for viewing.