Product Description: HOLDING TANKS RV; Systems Monitor IIThe Systems Monitor II will show you the levels in your fresh water, grey water and black water tanks with the push of a button. The separate battery switch will give you the battery level reading. The lighted pump switch shows when the pump is turned on. The 8" x 4" size allows easy mounting. Tank wire harnesses and screw-in sensor probes included. Monitor panel. ; Weight: 4.8900
