Like Having Eyes in The Back of Your Head. The Segway Rearview Radar detects approaching traffic from behind and sends sound, light, and on-screen alerts. Using millimeter wave radar, the smart system integrates with brake lights to help you see what you can’t see and ride with greater confidence. Visit your local bike shop for professional installation, designed to integrate with compatible eBike power and lighting systems without the need for an additional battery. What’s in the box: 1 × Radar 3 x M4*8 mm Screw 1 x Cable Tie Compatibility - Rearview Radar is compatible with Segway Myon and Muxi eBikes. NOT compatible with Xafari or Xyber eBike models.