This is the mini torch to beat all torches. It is extremely bright and the beam can be focussed. The operation is by means of a push button at the end. I nearly dropped it one star as to get the different modes you have to keep pressing the button. First press on full power, second press on 2/3 power, third press on 1/3 power, fourth press SOS mode and fifth press strobe effect. An improvement would be if you could 'dial up' the operating mode before switching on ( eg. twist disk on the power button end). After switching off for a while it reverts back to full beam. I acidently looked into the beam when on strobe in daylight and had a blind spot for ages so a) don't be tempted to do that and b) it would certainly stop an attacker.