Using the Klein ET20 is a piece of cake. First, make sure your lithium - ion battery is charged. You can check the battery status on the battery status indicator. Then, connect the borescope to your smartphone via the built - in WiFi signal. Download the free Klein Borescope App from the App Store if you have an iPhone or Google Play if you have an Android phone. Once the app is installed, you're ready to start inspecting. You can use the hook attachment to grab small objects if needed. The flexible gooseneck cable can be bent around obstacles to reach those hard - to - access spots. You can adjust the LED lights either on the borescope itself or through the app to get the best lighting for your inspection. After use, put the borescope back in the carrying case to protect it. For maintenance, keep the camera lens clean with a soft cloth. Also, make sure to recharge the battery regularly to keep it in good condition. And remember, it has passed a 3 - meter drop test, but still handle it with care to avoid any potential damage.
