AUTHOR Duplex X7 delivers the everyday performance you require from a rear light. The light features 3 modes, an easy on/off to seat post bracket with quick release tab. For cyclists who want to stay visible, ideal for commuters and cycling enthusiasts alike. 2x0,5W LED 20 lm output power. Battery 2x (AAA) zinc carbon included. Flashing 80h, steady 18h (both LED). Adjustable tool free bracket with silicon strap for diameter 15 –35mm even the unround profiles. Clothing clip for easy fixation to any textile loop. Flashing mode, steady of 1 LED or 2 LEDs. ↓↓↓# light batterywhere to buyaccessoriestechnical specificationphotogalleryvideogalleryproduct optionsaccessories Technical specificationRun timeFlashing mode up to 80 h., steady mode up to 18 h. (both LED) Photogallery Videogallery Product options black / red-glass24"-28" = UA#12039165 accessoriesAUTHOR Bracket ACC-X5Universal bracket for the lights Author A-Duplex X7, A-Square USB CobLed, A-Pilot CobLed USB 50 lm, A-Doppio 40 lm.