Check the listing for details. PAC VS41 Camera Switcher Interface. Condition: New. Listed at 89.99 USD. Product highlights4-way video switcher for front, side, and backup camera integration four video inputs and one video output for use with select factory and aftermarket receivers backup cam prioritization turn signals trigger side camera activation warranty: 1 year What's in the boxIntelligent 4 camera switcher Harness Installation Instructions About this itemWritten by Crutchfield's Alexander H.Your video brain If you're going big on aftermarket driver-assistance integration, PAC's VS41 camera switcher is your new best friend. This switcher lets you integrate up to four cameras in your vehicle, using a video receiver as a monitor. The best part is that PAC allows for automated switching — when you use your turn signals, the corresponding side camera engages and when you shift into reverse, the backup cam overrides any active video feed to give you a view of what's behind you.