Using your Lezyne Macro Drive 1400+ is easy. First, choose the right output mode for your situation. The Daytime Flash Mode is great for getting attention during the day, while Femto Mode gives you a super long runtime. To charge the light, use a USB - C charger (cable not included) at the waterproof charging port. Make sure to use a charger with 2A+ fast - charging capability for quicker recharging. You can mount it on your bike handlebars using the versatile strap. There's also a GoPro mount option if you prefer. When it comes to maintenance, keep it clean after use, especially if you've been riding in dirty or wet conditions. Since it's IPX7 waterproof, it can handle a bit of water, but don't submerge it for longer than necessary. And remember, the Lezyne Infinite Power Pack+(coming soon!) is the only compatible power pack for extended runtimes, so don't try to use the original Infinite Light Power Pack with this light.