The KTV PRO+ Ai ALERT REAR combines a compact, minimalist design with advanced AI-trained brake detection technology. Its wide-angle output provides up to 270° of visibility, while the versatile rubber-ring mount ensures a secure fit across most seat post shapes and sizes. FEATURES: Max 150 lumens / 28 hours Advanced Ai-trained brake detection technology. Alerting others of your presence when you need it most. Highly compact, rugged co-molded construction Wide Angle Optics for up to 270° of visibility. Minimalist, secure O-ring mounting system. Compatible with most seat post shapes and sizes. (round, D shape, and aero) Rigorously tested to IPX7 waterproof standards. Water-resistant USB-C charging port. (cable not included) 400 mAh battery capacity. User-replaceable battery design. (EU Batteries Regulation (2023/1542)) SPECS: Max Lumens: 150 lm Max Runtime: 28 hours Battery Capacity: 400 mAh Recharge Type: USB-C Features: IPX7, Wide Angle Optics, Ai Alert Weight: 32.6 g Dimensions: 39.9 × 25.2 × 55 mm