‎1.73 inches

【HANDS FREE FLASHLIGHTS & POWER DISPLAY】The led headlamp has a sensor built-in.In any working mode,you can easily turn ON/OFF the lights by waving your hand by pressing the sensor button. It is more convenient to control when your hands are dirty.This headlamp flashlight is very light and can be adjusted 90°and fixed firmly to allow you to focus the light exactly where you need it.Our headlamp pro has a power display let you know how much battery is remaining and when it’s time to charge.
【MINIMISE SINGLE USE BATTERIES】Unlike other headlight that uses disposable dry batteries which is impossible to cyclable and harmful to our mother earth. Bsichan brightest headlamp waterproof is made to fight against the gigantic amounts of disposable batteries that are sent to landfills every year. All you need to do is charge it using the USB cable. This can save you a lot of money over those using dry batteries.
【12 WORKING MODES&LONG BATTERY LIFE】This work light has 12different working modes that allow you to balance the brightness.The super bright headlamp is used with bright 5 LED bulbs,with higher brightness and wider light range rather than other ordinary headlights. This rechargeable headlamp comes with a 1500mAh rechargeable battery, which has a long battery life(it could be recharged 1,000 times). After fully charged, it can last for 4h in strong light, 5-6h in low light,and 7-10h in red light.