R-Guard PRO Alloy USB 90 lm

Author R-Guard Alloy USB Bicycle Tail Light with RADAR, ANT+ & Bluetooth

Take your road safety to the next level with the flagship Author R-Guard Alloy USB. This intelligent cycling companion combines a 90 lm smart radar, an automatic brake light, and dual ANT+ and Bluetooth connectivity. Stop guessing what is happening behind your back – the radar tracks the traffic for you and streams live data directly before your eyes.

Key Features

• Dual Wireless Connectivity: Equipped with ANT+ and Bluetooth technologies, this light seamlessly pairs with your GPS bike computer (such as Garmin, Wahoo, Bryton) or directly with your smartphone. You can track approaching vehicles clearly on your screen.
• Triple Alert System: The radar detects vehicles from up to 140 meters away at a 40° angle. It visually alerts you on your paired display, acoustically via the built-in loud speaker, and warns drivers behind you with a powerful 90-lumen strobe LED light.
• Intelligent Brake Sensor: An integrated accelerometer detects deceleration. When braking, the light ring instantly illuminates at its maximum output of 50 lm, providing an immediate warning to anyone behind you.
• Smart Auto ON/OFF Function: The light thinks for you. It automatically powers on when motion is detected and turns off after you stop, saving battery life. Easily switch between automatic and manual modes with a simple double-click of the power switch.
• Safe Mode for Peace of Mind: When the battery runs critically low, the light switches to a 5 lm eco-flash mode instead of shutting down. This provides an additional 30 minutes of runtime to get you safely to your destination.
• Premium Anodized Craftsmanship: The black anodized aluminum alloy case combined with polycarbonate plastic delivers high impact resistance and a premium look. An IP64 waterproof rating ensures total protection against splashing water and heavy rain.
• Quick Magnetic Mounting: The package features two premium magnetic brackets—one for the seatpost (compatible with both round and aero profiles) and one for the saddle rails. Snapping the light off to recharge via the modern USB-C port takes just a second.

Light Modes & Runtime

• High Constant: 30 lm – 5 hours
• Low Constant: 15 lm – 11 hours
• DayFlash: 50 lm – 10 hours
• NightFlash: 20 lm – 14 hours
• Breathing: 30 lm – 9 hours

Technical Specifications

• Wireless connectivity: ANT+ and Bluetooth
• Radar display compatibility: GPS bike computers with ANT+, smartphones with Bluetooth
• Radar alarm light brightness: 90 lm
• Rear light ring brightness: max. 50 lm
• Brake light brightness: 50 lm
• Radar detection distance: up to 140 m
• Radar detection angle: 40°
• Radar alarm system: built-in loud speaker + strong strobe LED light + display data transfer
• Battery capacity: 1100 mAh
• Charging port: USB-C
• Material: Black anodized aluminum alloy case + polycarbonate plastic
• Waterproof level: IP64
• Product size: 80 × 30 × 23 mm
• Net weight: 62 g
• Included brackets: magnetic seatpost bracket + magnetic saddle rail bracket
• Seatpost compatibility: round and aero seatposts