Using the Shokz OpenFit Air earbuds is easy. First, make sure the earbuds are charged. You can charge them in the charging case. Then, take them out of the case and they'll automatically pair with your device if it's been paired before. Put them on your ears using the adjustable earhook for a comfortable fit. When you want to listen to music, just play it from your device and enjoy the great sound. To make a call, answer or end it using the controls on the earbuds. As for maintenance, keep them clean by gently wiping them with a dry cloth. Since they have IP54 dust and water/sweat resistance, they can handle some sweat and light splashes, but don't submerge them in water. Also, don't expose them to extreme temperatures. If you're not using them for a long time, keep them in the charging case to maintain the battery life.