There is a magnet on its back, can attached on iron surface easily, If your door is wooden, it should be install with adhesive label. After that, attached the bell on it for finishing installation. The sound is clear and beautiful, the volume is moderate, transparent and does not disturb the people. It is the best decorative gift for family and . It can be hung on the door, the window, the switch will make a sound, or it can be hung anywhere in as a decoration. The wind chime is the sound of the wind and the singing of the heart. It expresses and thoughts clearly and extends the longing.