Good working bicycle lighting is essential to see and be seen in traffic. This Dresco dynamo helps you with that. The black Dresco alternator in a plastic housing is mounted on the existing dynamo hook. Suitable for mounting, with the supplied bolt and nut, on the left side of the bike. The alternator has a single connection for the power supply and the serrated running wheel provides sufficient grip on the bicycle tire. Easy to unlock with the push button. The alternator provides a voltage of up to 6 volts and a power of 3 watts.