You can click, but you don't have to. Our SPARKLER headlamp has motion sensors, so it's up to you whether you choose classic switching by pressing a button or simply by waving your hand. The right button activates sensors that respond to movement in front of the headlamp up to 30 centimeters - select the intensity of the light (100 or 30 percent) with the button, and then just turn it off or on. By pressing the left button you have a choice of three light intensities (100, 30 and 10 percent), holding it for two seconds will light up the red LEDs, which can light up continuously or flash. Our SPARKLER headlamp is powered by an integrated rechargeable battery, the package also including a USB charging cable. It does not fall off the head thanks to the comfortable rubber strap, which you can easily be adjusted for length. There’s also the possibility of changing the angle of the light. With the SPARKLER headlamp, you can go night skiing; it can serve you equally at your campsite or out in the forest, and you can also be as quiet as a mouse with it. Specification: Material: ABS Dimensions: 6.5 x 3.5 x 4 cms Weight: 70 g Bulbs: 3W LED XPE Luminous flux: 160 lm Range: 120 m main spot light, 10 m side scattered Standard modes: 100%, 30% and 10% intensity, flashing, red light continuous and intermittent; sensor modes: 100% and 30% intensity Power supply: integrated 3.7v rechargeable battery 1200 mAh Endurance: 4-30 hours Adjustable strap Rechargeable USB cable