Use APKPure App
Get Self-Defence Sound old version APK for Android
This app can play sound to protect you sometimes
It can Protect You, Scare the bad person off
You can choose the sound type, such as Car Sound, Smoke Sound, Submarine Sound, Air-Raid Sound.
User guide:
1. choose the sound type in "Sound Settings"
2. choose the sound volume in "Sound Settings"
3. press the middle red button when in danger