For years, service techs have been crouching in small crawl spaces, shining flashlights into clogged pipes or simply guessing what’s inside the wall they’re about to drill into. With the advancements in digital camera technology, however, the guess work can be removed.

Now, technicians can simply use a wireless video inspection camera tool. These cameras are ideal for inspecting difficult-to-reach places. Most come with a wireless color monitor connected to a flexible waterproof camera-tipped probe. The device is offered by a variety of brands such as Milwaukee, Bosch, and DeWalt, and is priced anywhere between $200 and $300.

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