Lifesystems Intensity 80 Headtorch has a 80 lumen LED with 3 settings; MAX which is a bright focused beam, ECO which gives a less bright but battery conserving beam & of course the SOS flashing function. One of the coolest things about this Head torch is that it can be turned on & off with the wave of your h&. Ideal when wearing bulky gloves. The red light is found at the rear of the unit making you visible to people behind you, so not only would it be a great group survival aid but also an ideal road bike head torch. The red light is equipped with a constant & flashing functions. 80 lumen LED 90m maximum range Takes 3 x AAA alkaline batteries 21 hours battery life on MAX 185 hours battery life on ECO Rear red light Turn it on & off with the wave of your hand