Using the Ernie Ball ProTune USB - C Clip - on Tuner is a breeze. First, clip it onto the headstock of your instrument. Make sure the clip is firmly attached for accurate readings. Then, turn it on and select your preferred tuning mode from the five available options. The high - visibility color display will show you the tuning status clearly. When it comes to charging, use a USB - C cable to connect the tuner to a power source. For long - lasting performance, avoid exposing the tuner to extreme temperatures or moisture. Keep it clean by gently wiping it with a soft, dry cloth. With proper use and care, this tuner will serve you well for a long time.