The Sigma Sport DD291661 rear bicycle light combines lighting with radar that detects vehicles approaching from behind at a distance of up to 160 m. It can detect up to 8 vehicles and send alerts to a compatible GPS bike computer via the ANT+ radar profile. The light is visible from up to 500 m away and activates brighter illumination when it detects deceleration.

It connects via Bluetooth to the SIGMA RIDE app for battery status monitoring and software updates. It offers 6 lighting modes, including Peloton mode, and run time reaches up to 30 hours in radar-only mode. It attaches to the seatpost with a rubber mount and strap.

• Type: Rear light
• Radar: Detects vehicles up to 160 m away
• Number of vehicles: Up to 8
• Light visibility: Up to 500 m
• Brake light: Activates when decelerating
• Compatibility: GPS bike computers with the ANT+ radar profile
• Connectivity: Bluetooth
• App: SIGMA RIDE
• Lighting modes: 6, including Peloton mode
• Run time: Up to 30 hours in radar-only mode
• Sensor angle: 2 × 30°
• Lighting angle: 220°
• Alerts: Visual and audible alerts via a compatible GPS computer
• Mounting: On the seatpost, with a rubber mount and strap