The Supernova E3 V521 e-bike headlight is based on the popular V6 model housing from Supernova. However, the E3 V521E bike headlight offers a special advantage with its completely newly developed electronics, which can now also process voltages of up to 21 volts. Particularly noteworthy is the "instant start" function, which allows the headlight to be used even with systems that are sensitive to starting currents, thus significantly extending the service life and brightness stability of the LED.