Hi Gordon_s1942
I know of 2 The blackvue dr650gw-2ch and Thinkware f770.
The Thinkware if it's hardwired has built in low voltage cutout and the Blackvue needs a add-on power-magic to do the same.
The Thinkware unit has better night vision,update-able safety cam warning and lane departure warning but the rear cam is a extra.
SS Dave
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