I got the 10.1 and found out later that there were older versions for sale, especially on youtube... you can also ask the youtube seller re specifications and make sure he guarantees if he says the sensors are built in. I looked for used samsung galaxy tablets under $75
Typical scenario for using the meter
3:01pm Currently the source is on the left side of the living room, near the window.
3:02pm now it was moved to the right side past the kitchen counter near the wall.
3:03pm now its back on the left side near window.
3:04pm now back on right side.
This person is going through a phase of testing me to see if I really can locate his positioning and he is worried.
This is typical. The handler can see me doing this and is trying to maintain covert anonymity. He knows or should know that if I can locate him so easily then so can the authorities or someone I might hire or a bounty hunter can locate him for instance. The possibilities are endless. These Private Contractor Handlers are used to having their position remain undisclosed and non-locatable. Now with the advent and popularity of the android cell phone, this anonymity is a thing of the past. Unlike the use of shielding, I didn't notice and increase in targeting if you use this meter. If anything it is a deterrent to irradiating the TI from a near by location. You are suffering needlessly by not using this free meter. Contact me if you need assistance. James ... Jafelco@gmail.com