Emmako HD 720P Digital Wireless Backup Camera With 5'' Monitor System For Trailer,Truck,RV,Motorhome,High-Speed Observation Camera Adjustable Rear/Front View, Guide Lines ON/Off,IP69K Waterproof KONG Graduation

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And 0-7 adjustable levels allow you to adjust the intensity according to your dog's behavior（Beep is defaulted setting）You can choose no shock mode as your needs

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Emmako HD 720P Digital Wireless Backup Camera With 5'' Monitor System For Trailer,Truck,RV,Motorhome,High-Speed Observation Camera Adjustable Rear/Front View, Guide Lines ON/Off,IP69K Waterproof KONG GraduationBrand: Emmako Features: Upgraded HD Digital Wireless Camera System : 100% No Interference open area 984 ft line of sight,working on vehicle range under 60ft. But depends on what the Signal has to pass through but should be adequate for most people 5 inch Monitor mounts on your dash and gets power with the included cigarette light plug. Multifunction Newly designed screen: You can adjust brightness, contrast, saturation, tint, language,switch grid