38 Chord music
The default ringtone is "Ding Dong", and the built-in high-quality large-diameter speaker has a clear, loud and beautiful sound.
3 years battery life
The transmitter uses a 3V CR2032 lithium battery with a long three-year lifespan, eliminating the trouble of frequent battery purchases.
4-Step volume adjustment
4-level volume can be adjusted at will,the maximum volume can be adjusted.Up to 115dB,the elderly at home can also hear.