Using the Fender Mustang Micro Plus is a breeze. First, plug the amplifier directly into your guitar's jack using the rotating input plug. Then, connect your earbuds or headphones to the 1/8' stereo headphone jack. You can choose from the amazing factory presets using the buttons on the amplifier. If you want to customize your sound, use the Fender Tone App on your iOS or Android device via Bluetooth. To tune your guitar, press the Tap/Tuner button. When it comes to power, charge the amplifier using the USB cable. You'll get over 4 hours of continuous play on a single charge. As for maintenance, keep the amplifier clean and dry. Avoid exposing it to extreme temperatures or moisture. If you're not using it for a long time, make sure the battery is fully charged and stored properly. Enjoy your jamming sessions with the Fender Mustang Micro Plus!