Using these earphones is easy. First, make sure to choose the right size of foam or silicone earplugs for a good fit. Then, wear them over your ears for stability and comfort. To connect, turn on the Bluetooth on your device and pair it with the earphones. Once connected, you can enjoy music, take calls, watch videos, or play games. When it comes to battery, charge it using the included USB cable when the power runs low. The earphones can last up to 7 hours on a single charge. To maintain them, keep them in the zipper carry case when not in use to protect them from dust and damage. Clean the earplugs regularly to keep the sound quality good. Also, don't expose them to extreme temperatures or moisture. With proper use and care, these earphones will serve you well for a long time.