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Easy Depth Check is an depth checking system with app. When you go to an unfamiliar place, and you don’t know how deep the river is. You can put your phone into the device. Then the phone will show up the app. On the upper right corner is a buoy. When you want to check the depth of river, pull out the buoy and through out like fishing. Using the echolocation technique and Bluetooth, you can get the depth of river on your phone.
Taipei City, Taiwan