Junsun v1 pro parking sensor help

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Hello in first sorry for my english i'm french.I just install a v1 pro 128gb unit on my car ( peugeot 508 sw 2012 )In my car i have park sensor it's work perfectly with oem unit but with junsun work not like i want ...I have many latence and the unit take a time to bip and for show me the line ..How can i adjust ? i don't have app for this .. thank's and have a good days