Powerful rear bike light with USB charging and four light modes. Maximum luminous flux of 100 lumens ensures amazing visibility anywhere. The silicone strap allows for easy attachment without the use of tools on aero or round seatposts or on a cycling helmet. Certified water resistance IPX6. Maximum light output: 100 Lumens Light source: 9 super bright LEDs Battery: 3.7 V 700mAh Lithium Ion (integrated) Lighting modes: 4, 3 h. (Constant) / 5 h. (Blinking+Constant) / 10 h. (Constant+Blink Sequence) / 30 h. (Blinking) Charging connector: USB Type-C Charging time: 3-4 h. Input values: 5V 500mA Material: Engineering grade polymer Mounting: silicone strap, mounting on aero or round seatposts (ø25.4 - ø34.9mm), rails, helmets, Topeak bags Waterproof rating: IPX 6 Dimensions: 5.7 x 4.1 x 2.5 cm Weight: 30 g