Chime looks like a fire chopstick chime. The solid aluminum bar has a clear clear sound "Bo" also means "live and live" in Danish. Since it has a built-in magnet, it can be mounted directly on iron doors that are often used in apartments. Attach the included iron plate firstly on doors where magnets do not work on aluminum, wood, etc. (Use the included adhesive tape or wood screws. Tori, Tama is for doors only. Bo can be used on both doors and sliding doors. This is a design item that allows you to enjoy sound, so it is not suitable for purposes that require loud sound such as theft prevention.