Sonar Finder

聲納搜索可以連接到按鍵，讓您可以在位於然後當失去了

Like a bat, App sends sonar coded with a special signal. The device equipped with a microphone can decode the signal and beep if it is near your phone. It is a magical way to find keys or other items.

- No need to pair the device

- Can find the item within 60 seconds

- Distance up to 20 meters

- Locate the item through the GPS of your phone