Great news Peabody,
I presume it also penetrates walls, and the distance is 10 meters, using the supplied antenna.
Nice to know.
Have you tried with movement in the pathway?
Built in RF antennas is not the best kind - no matter what frequency.
- too sad I can't patent an external antenna and put it on a mobile phone
The best ones are at the top left - right?
My first phone is/was #4, a blue Nokia 3510. It still keeps going quite well on the original battery - I charge and discharge it once in a while (quarterly/half year), and I keep it running for a few days at a time. The battery lasts for days with no calls made. Must take care of those Li-ion batts, otherwise they decompose. If 'dead', it can be trained back to life, if the drain is low enough.
Edit - phone = mobile phone.