The Author Stake Mini USB is designed as compact universal flashing light with rechargeable Li-ion battery. There is no problem to fix it on bicycle, stroller or as a clothing accessory. Stake Mini USB increse you visibility and safety level easily and quickly. - Rechargable Li-ion battery (500 charging cycles). - Steady mode 12 lm – 4h. - Flashing modes 12lm – 11 h (slow flashing, quick flashing and strobe). - Universal tool free fixation for diameter 15 –35mm even the unround profiles (2 sizes O-rings inludes the packing). - Charging cable included (USB A / Micro-B).