Installed the 507s when I bought the coach. They fill sorta slow (newer models are supposed to be better). The batteries that came with the system all failed within 14 months. The replacements are still holding up. The batteries (1632) are hard to find but available (Walgreens). Works fine - display is easy to read and easy to program but it does take time to get use to the system. I hardwired display to the power wire to the jack control panel.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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