Cat claw doorbell

This product is to upgrade the door bell, can be with the help of external force (door vibration: manual shaking) jingling sound, the farther away from the door shaft, the more clear the sound. Place the sound near the door handle is more ethereal, the sound is more large, the sound near the door shaft is more crisp, the sound is small.
Clear and ethereal, stretching for a few seconds of lingering sound winding