1.No Standalone lithium batteries are sold with the product' 2.[6 Modes & Memory Function] There are 6 modes in the switch -main light/side light/high light/low light /strobe/extremely bright. Click the button with the flashing , you can turn into the three-light super bright mode. It also has a memory function, if you stay in a mode for 5 seconds, it will remain in this mode when you turn it on again. 3.[USB Rechargeable & Adjustable Headlamp] The charging method of this rechargeable headlamp adopts anti-reversal USB charging port. The headlight can be rotated 180 degrees and you can ly guide it where you need it, it also has an adjustable headband, suitable for adults or children and will not fall off during use. 4.[IP65 & Magnetic & Pen Clip Function] This is an IPX65 waterproof headlamp flashlight, which can be used in harsh conditions. After removing the headband and bracket, this headlight can be used as a work light, signal light, camping light, attach the pen holder, which can help you hang it on your shoulder bag. 5.[Adjustable Webbing]The headlamps for adults can be adjusted according to the size of the head, The head flashlight uses comfortable elastic headband, which can easily adjust the length to perfectly fit your head size, perfect for adults and which can be well fixed on the head and is not easy to slip or lose during use. 6.[Super ]The prompt light shows the battery level. After charging, the headlamp can last for 5-10 hours according to different lighting modes. It has powerful 1500mAh built-in rechargeable battery, which can be able to charge and turn on the lights at the same time. No need to wait for full charge or replace the battery. And the battery indicator will help you master battery usage. 7.[Best Gift]A Head lamp flashlight is great gift choice for outdoor hikers! Each package contains 1 super durable headlamps. Also the gift for fathers, husbands, and friends. The head lamp can be used in various scenarios such as sports, hallways, and work.