I GOT THESE ABOUT 4 MONTHS AGO. SEEMS LIKE THEY WERE $99 THEN. Work good. Turn it on (wake it up by pushing on button) before I start the bike & it will register the last air setting when I pulled in.? Back the bike out of the garage (15') & it registers? the current reading. It will go to sleep by its self. press the on to wake it up after parking.? In struction not too good or I just don't read too good. Nice secure feeling to see that air pressure is rite.?

TPMS for Motorcycle 2 External Sensors Waterproof Bag for LCD Monitor | eBay