Using the BOSS Katana Air is a breeze. First, plug the compact wireless transmitter into your electric guitar. If you're using batteries, insert eight AA - size batteries into the amplifier; you can also use the included AC adapter. Once powered on, turn on the amp and your guitar. The motion - sensing technology in the transmitter will wake the amp from standby if it's in that mode. You can start jamming right away!To customize your sound, download the BOSS Tone Studio app on your iOS or Android device. Connect to the amp wirelessly and edit and organize tones as you like. You can also play along with music streamed from your mobile device via Bluetooth. Just pair your device with the amp and start playing!When it comes to the transmitter, it provides 12 hours of playing time on a single charge. If you're not using it for a while, it will automatically enter standby mode to save power. Dock it in the amp to charge it.For maintenance, keep the amplifier and the transmitter clean. Wipe them gently with a dry cloth. Avoid exposing them to extreme temperatures or humidity. Also, if you're using batteries, replace them regularly to ensure optimal performance. When using the optional EV - 1 - WL Wireless MIDI Expression Pedal, follow the instructions that come with it to control effects and other features.