The new SL 100 compact safety light is the ideal back up rear led for cycling, running or any other activity where it pays to be seen. Using an elasticated cord, the SL 100 can be mounted almost anywhere from the seatpost of your bike to your rucksack or even directly to your body. The SL 100 features 2 small, yet very bright leds in its compact and totally waterproof casing. Its innovative magnetic switch is activated by the toggle at the end of the elasticated cord! Just tap the led side to move between the 3 modes. How simple is that! Run time: 30 hours constant. 90 hours flashing. 140 hours alternating flashing.