Device for tracing a PVC pipe

[Benz]

Hello,
I see devices that have a transmitter on a snake line and a wand to trace as it goes through a pipe. Does anyone have any experience with these devices and if they work. Here is one I found on amazon but they can be found cheaper on other sites. I have a pipe going under the slab of my home and I have no idea where it terminates.
https://www.amazon.com/UNI-T-UT661B...coding=UTF8&psc=1&refRID=Z4FHAX5M2Q68XAHQS97K

Thanks

 

[Breplum]

fyi, all sewer and drain contractors own actual, professional locating equipment.
Pipe locating is a normal operation for anybody who owns the equip.