Vertiko Lens Vertiko LensDescription LED battery rear light for mounting on the seat post, tool-free battery change.Features >> Illumination time approx. 900 min.>> 2x AAA Batteries>> Attachment to any seat post>> Approved for GermanyOperation manual ↓more products Lighting Carrier Mudguards Grips Accessories Spokes Wheels Rims Saddles Locks Uwe Ruppel