Using your NiteRider Solas 250 Tail Light is a breeze. First, you can use the easy - on and off seat post strap mount with the quick - release tab to attach it to your bike. You can also clip it onto various straps or belt loops if you want to wear it. To turn it on, just press the appropriate button. You can switch between the 4 modes (2 flash and 2 steady) to suit your cycling situation. For group rides, use the Group Ride Mode to be visible without bothering others.
When it comes to charging, it's USB rechargeable. Just connect it to a power source with a USB cable. Make sure to keep it away from extreme heat or cold. And since it's dust and water - resistant (FL1 Standard IP64), it can handle normal weather conditions, but don't submerge it in water. Regularly check the light output and the battery level to ensure it's always ready for your next ride.