Smart doorbell which is unlike the traditional wireless doorbell. It is simple & easy to operate, has stable transmission signal, fit for apartment, villas, home, hospital and many other places. Built in kinetic energy module. No longer worry about replacing batteries. Over 200,000 times pressing test, if we press it 30 times a day,the lifespan can be 20 years.
51 songs selectable Not only dingdong but also wonderful music. 4 volume control inculde scilence mold.Don’t afraid it will bother you, You can change the volume by yourself.