432Hz Chord Doorbell tone tuning. Not only the doorbell, it can also make a sound through the inertia of opening and closing the door. it is perfect for relaxation, meditation, or just to add a touch of music to your environment. Enjoy the calming tones as this instrument helps soothe and uplift your mood. Bring peace and tranquility as you explore the wonderful presence of sound.Specification★ Model: A add9 / #Cm 7 / Bm7 / E add9★ Materials: Natural solid wood★ Tone : 432Hz★ Item Size: 12.8 * 9 * 5.3cm/ 5 * 3.54 * 2.08 in★ Item Weight: 175g / G.W. : 285gFour chord sound options. A add9: A-#C-E-B#Cm 7: #C-E-bA-BBm7: B-D-#F-AE add9: E-bA-B-#FPackage list:1 * Chord doorbell