Hand Pressing Flash Light: No battery no bulb, simply shake to recharge- lifetime no electricity or battery required. Uses: Best to keep 1 in your car glove box for emergency break down conditions or office drawer for power cut situations or even gift 1 for the lady to keep 1 in her kitchen or to your old parents for their night walk or your sister or wife in case of street light missing on roads during evenings. And for all time sake, 1 in your pocket just to impress your girlfriend or your friends. And no-brainer must for trips picnics and trekking. Incase if you are into improving your blood circulation, the hand crank does that too, due to its squeezing function improving your grip. Specifications: Simply shake to recharge, by hand squeezing on or off switch allows flashlight to always be charged locking mechanism for the lever allowing it to be inserted inside simply squeeze the handle repeatedly it to recharge best translucent ABS rigid strong plastic body, will not break easily on fall. Cool hand strap for hanging or holding. Looks smart and funky in translucent casing. No battery or DC jack is needed, exposing the internal gears and mechanism 3 super bright white LED's Life of LED bulb last for over 50000 hours water resistant to normal rain or drops of water, but does not work under water. How to use: Very simple, just open the safety lock mechanism and squeeze the lever for around 1 minute to gain around 30 mins of battery power for max of full capacity you can squeeze for 5 minutes and it gives more then 1 hour of battery power after which at 1 point on 1 hour + usage at some time the led will dim, where by you can replenish them again with 1 min of squeeze for 30 mins of life or 5 mins of squeeze for 1 + hour of life. Also you can keep the battery power conserved once you squeeze by closing the on or off switch and the power will get conserved, you can spend this power whomsoever you want.