Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
Really small, it will fit into every DIY project.
Really good price (don't bother soldering your own, it is better to buy one)
Detection LED on board (it will show you when it is working)
Range tuning available (two variable resistors on board)
Short range (which is a pro for me)
No manual attached (you will have to check how it is working for yourself)
Doesn't work on every objects, but I think it is normal.
Good for do it yourself projects, small toys, home automation projects, etc.
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