K1710 Strong Wireless Electronic Doorbell IP65 Waterproof Doorbell 38 Music with One Transmitter EU Plug and One Receiver Heart Rate Sensor Smartphone OS

Heart Rate Sensor Smartphone OS Compatibility: Android 4

Is is anti-skid and stable for your phones

you can choose Bluetooth because of hands free for outdoors and indoors

5 pairs earbuds for changing

K1710 Strong Wireless Electronic Doorbell IP65 Waterproof Doorbell 38 Music with One Transmitter EU Plug and One Receiver Heart Rate Sensor Smartphone OSProduct Features: Long Wireless Range: Operating range up to 120m in open area ensures you to hear the bell and answer the door in time. Never miss your guests! 38 Different Ringtones: Provide 36 kinds of beautiful music to choose with 3 levels of adjustable volume from 20db to 80db. Wide Compatibility: Can be widely used in homes, apartments, villas, shopping malls, hospitals, seniors and disabled use the doorbells as assisted living call pagers, and