This little device does what it promises! I've only tested it at home, but it easily detects Wi-Fi, Bluetooth, and cell phone signals. I bought this because I often drop/lose my phone when working in areas with no cell coverage. Being able to detect the outgoing signal of phones will help me a lot to find the phones in my list quickly. Hidden Camera Detection is a little tricky to use, there are many things that reflect vibrant red light other than camera lenses. Great little gadget!
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