The Busch & Müller Secula rear light creates a LineTec light ring from a high-performance LED through a prism system, which is very eye-catching thanks to its "spatial" shape and makes it easier for other road users to estimate the distance to the bike. StVZO-approved. Features: with German certification mark, 2x AAA battery operation (exclusive) strut or seat post mounting, StVZO-approved, weight: 90g.