There is a depth indicator bar on the left sidebar of the application that tells you the approximate depth of the coin. 

I check the manual and it said you can choose from feet, yard, and meter. 

When fully charged, the standby time can reach 260 hours and the talk time can reach 24 hours. 

The electric vehicle charger can be used outdoors, but before use, it is necessary to ensure that the plug and charger socket are dry and free from any moisture or leakage. At the same time, it is necessary to avoid being attacked by wind and rain during use, and pay attention to observing whether the working state of the charger and plug is normal at any time. 

Hello, we would like to explain to you that this microscope is currently unable to connect to WiFi. Setting up a smartphone for taking photos requires the following steps: 1 Install the phone adapter onto the microscope eyepiece, then install the smartphone onto the phone adapter and align the camera lens with the eyepiece. 2. Fine tune the angle of the phone lens until a large and clear circular interface appears in the center of the screen. 3. Observe the slide, focus until the image is clear, and take a photo. I hope it can help you.