This is an auto-tuner suitable for tuning ukuleles and guitars. The vibration sensor enables accurate tuning in noisy environments. The auto-detect function indicates the note name. An easy-to-see LED display shows what adjustments are being made. The auto-off function improves battery life. Cherub WST-550G Guitar Mate Auto-detect function: Turn on the tuner and strum a string, and the note name will be automatically displayed by vibration. LED display: You can check the pitch deviation with the LED bar on the right. If the "0" in the center lights up green, it is tuned accurately. Easy operation: Just turn on the power switch to use, and basically no complicated settings are required. Clip-on type: It can be easily attached anywhere that vibrates, such as the guitar head. No shield is needed, making it easy to use. Energy-saving design: The auto-off function automatically turns off the power if no signal is input for a certain period of time. Cherub Guitar Mate 180° Clip-on Tuner for Acoustic Guitar, Electric Guitar, LED Display WST-550G