The Lezyne Saddle Ai Alert 250 Rear Light is a high-performance taillight designed to enhance safety for cyclists. Here's an overview of its key features and specifications:

Key Features:

• Ai Alert Technology: The standout feature is its advanced Ai Alert brake sensing technology. This technology uses machine learning to accurately detect deceleration events, automatically switching the light to a distinct 'brake light' mode, signaling to those behind the cyclist that they are slowing down.
• Enclosed AI System: The AI system is enclosed and does not collect any rider data, ensuring privacy while providing accurate brake light functionality.
• Max Lumens: The light can output up to 250 lumens, providing high visibility, especially during daytime rides.
• Multiple Output Modes: The light offers 7 different output modes, including solid and flashing options to suit various riding conditions:
  • Economy Mode: 10 lumens with a runtime of 20 hours.
  • Blast Mode: 80 lumens with a runtime of 4 hours.
  • Pulse Mode: 50 lumens with a runtime of 8 hours.
  • Flash 1 Mode: 50 lumens with a runtime of 34 hours.
  • Day Flash 1 Mode: 250 lumens with a runtime of 15 hours.
  • Day Flash 2 Mode: 125 lumens with a runtime of 25 hours.
  • Femto Mode: 10 lumens with a runtime of 60 hours.
  • Active Alert Mode: Activates at 250 lumens during braking.

Technical Specifications:

• Battery Capacity: 1100 mAh, providing sufficient power for extended use.
• Rechargeable: Via USB-C (cable not included), ensuring fast and efficient recharging.
• Weight: 73 grams, making it lightweight and easy to mount on a bike.
• Durability: IPX7 waterproof rating, ensuring it can withstand heavy rain and wet conditions.
• Construction: Made from fully CNC machined aluminum, contributing to its durability and sleek appearance.
• Visibility: Features Wide Angle Optics, offering 270 degrees of visibility, making the rider highly visible from various angles.

This taillight is ideal for cyclists looking for enhanced safety features, especially for those who ride in varying light conditions or in traffic, where clear signaling is crucial.