I just bought this one while time-serting my sparkplug hole. Works great as long as its fully charged. If you want to see the pics from it they are in the last page of my build.
DEPSTECH Wireless Endoscope, IP67 Waterproof WiFi Borescope Inspection 2.0 Megapixels HD Snake Camera for Android and iOS Smartphone, iPhone, Samsung, Tablet -Black(11.5FT) Amazon.com: DEPSTECH Wireless Endoscope, IP67 Waterproof WiFi Borescope Inspection 2.0 Megapixels HD Snake Camera for Android and iOS Smartphone, iPhone, Samsung, Tablet -Black(11.5FT): Automotive
As for obd i use an ultragauge and its come in handy a lot
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