Using the Peterson PitchGrabber Active Clip - On Pickup is easy. First, clip it onto your musical instrument. Make sure the clip fits well, especially if you're using it on horns or flutes. Connect the 8 - foot cord to the headphone/mic input of your mobile device. Then open your tuning app. You're ready to start tuning. Remember, if you're using an iPhone 7 series, you'll need a Lightning to 3.5mm adaptor (not included). When using it in a noisy environment, it really shines as it can isolate the sound of your instrument. After use, gently remove it from the instrument. Keep the cord tidy to avoid tangles. Store it in a dry place to maintain its performance. Don't force the clip onto very hard or sharp objects as it may damage the jaws or the pickup.