Using your Fender Marine Layer Reverb Guitar Effects Pedal is easy. First, connect it to your guitar and amplifier in your signal chain. Turn the knobs to adjust the different reverb types like Hall, Room or Shimmer according to your preference. When you want to mute the effect, just do so, and you'll notice the reverb tails continue for a natural sound. As for the battery, the magnetically latched hinged 9V battery door makes it simple to replace. Keep in mind that to maintain its performance, avoid exposing it to extreme temperatures and moisture. Clean the anodized aluminum body gently with a soft cloth if it gets dirty. Enjoy creating amazing guitar sounds with this pedal!