For sale is a LMWCC020 Accelerometer Listening Device. From what I know, it uses two sensitive accelerometer sensors to monitor sounds through wall vibration. Works as a stereo listening device. Otherwise, I don't know how to test it or use it. Does not come with the sensors.
The item "LMWCC020 Accelerometer Listening Device - HIGH TECH SPY GADGETRY" is in sale since Thursday, February 15, 2018. This item is in the category "Consumer Electronics\Gadgets & Other Electronics\Surveillance Gadgets". The seller is "v8unleashed" and is located in Delaplane, Virginia. This item can be shipped to United States.