SERFAS USL-11 / UTL-11 | High-Visibility Safety Light for Day and Night

The entire body illuminates, ensuring you are seen. A safety light that adds peace of mind to your daily ride.

The role of a light isn't just to illuminate the road. Clearly signaling your presence to others is also an essential element for safe riding.

The SERFAS USL-11 / UTL-11 is a safety light with a unique structure where the entire transparent resin body illuminates. It ensures high visibility not only from the front and rear but also from the sides, making your presence clearly known at intersections and in busy urban areas with heavy traffic.

With 300-degree visibility and a maximum visible distance of approximately 1000m, it is effective as a daytime running light and is suitable for a wide range of situations, from commuting to school, city riding, and night rides.

The compact, USB-rechargeable body weighs only 29g. In addition to easy installation with a silicone strap, it also supports clip attachment, allowing it to be attached not only to bicycles but also to bags and clothing.

Features

• High-visibility design with the entire transparent resin body illuminating
• 300-degree visibility to signal your presence from the sides
• Maximum visible distance of approximately 1000m
• Daytime flash mode to enhance daytime visibility
• Backlit switch allows checking charge status and remaining battery
• Mode memory function included
• USB rechargeable for repeated use
• 2-way attachment method with clip and silicone strap
• IPX4 waterproof for sudden rain
• Lightweight 29g for minimal burden when attached

SPEC

• Mounting position: Front (USL-11) / Rear (UTL-11)
• Lighting modes: 6 types
• High steady: 20 lumens / approx. 5.5 hours
• Daytime flash: 20 lumens / approx. 44 hours
• Medium steady: 10 lumens / approx. 11 hours
• Medium flash: 5 lumens / approx. 93 hours
• Low steady: 5 lumens / approx. 20.5 hours
• Low flash: 2 lumens / approx. 194 hours
• Battery: 200mAh Lithium-ion
• Charging method: USB charging (microUSB)
• Charging time: Approx. 3 hours
• Weight: 29g (including strap)
• Compatible diameter: 22-35mm
• Waterproof rating: IPX4
• Accessories: Light unit, silicone strap, USB charging cable

The main appeal of this light is its extremely high visibility. Since the light is clearly visible not only from the front but also from the sides, it provides a sense of security in places with high risks of contact with vehicles, such as intersections and residential areas.

It's easy to attach and lightweight, so it doesn't detract from the appearance of your handlebars or seatpost area. This safety light is highly recommended for daily commuting to school or work, and especially for anyone who wants to "prioritize safety first."