Submetering Evolved! Not long ago meters were read by simply walking up and flipping the lid on the meter.  Then came along remote read water meters that could be wired to a display unit. Then meters were wired to  radio transmitters  that would communicate to a collector (partially wireless). H2oMobile submetering system is fully wireless. The Radio Transmitter has been built-in to the meter. This eliminates the need for anywires or external radio transmitter.