E3 2 Taillights are designed to work in concert with Supernova Dynamo and E-Bike Headlights to provide exceptional front and rear illumination. Featuring 3 bright LEDs, E3 2 taillights also feature a stand light. 100% waterproof. One of the brightest rear lights that is road legal in Germany. Features side illumination to increases traffic safety. For 6V DC from E3 Pro front lights. Four times brighter than previous versions. Wide angle 250 degree light distribution. Supernova rear lights are best matched to Supernova front lights and are not recommended for use with other manufacturers. Weight: 12. Battery: Dynamo. Recharge Type: Not Rechargable.