Bought to hold my small ET310 circuit finder and accessories and it works if you disconnect the circuit finder transmitter from the receiver. (There's no reason to keep them together when you have a case that can power them). There is nothing more to add to the simple case. It looks like nylon material, inside there is a small pocket for small things and a zipper. This is something that many companies include "free" with the device, but then they charge extra for the device to make up for it. I'm happy with Klein's approach because those who don't need a case can save some money on a la carte devices.
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