Stop in for a cup of coffee

There are a few sun tachs that are over a grand and they have to have a transmitter that uses a weird mercury battery that you cant even buy anymore.



https://www.ebay.com/itm/2650365626...VFXs9z8yd_VWem8sHPuC61a-eyZ_RYjgaAicDEALw_wcB