Meet Hexagon: a versatile tool that allows cyclists to view the traffic behind them and live stream their ride. It comes with a rear-view WiFi camera, safety signals, and activity tracking. It has an iOS / Android app to show you camera footage in real-time.
Hexagon has a plug & play design. Its app can detect when you are in an accident to alert your contacts with GPS coordinates. Did we mention that the device can also serve as a power bank for your smartphone and activity sensor?