"..could be used to track an object up to 400m ..work for a couple of days with the little button cell ..Building it...

Originally shared by Mark Phelan

"..could be used to track an object up to 400m ..work for a couple of days with the little button cell ..Building it requires ..steady hands. Make your own PCB layout or download mine from here..": http://www.instructables.com/id/Tiny-UHF-Tracker-Transmitter/
http://www.instructables.com/id/Tiny-UHF-Tracker-Transmitter/