3 in 1 device consisting of a tuner, metronome, and tone generator together in a compact and smart looking package with 20ms response time steady detection and accurate tuning. It's suitable for guitars, woodwinds, brass and stringed instruments. Using Cherub's proprietary tuning software it tunes faster and more accurately than other tuners of its kind. A built-in speaker allows you to hear the beat and tone and the large screen with two dual-colour LEDs is easy to read. Features: Tempo range:30~280bpm Tone generator-A440, Dual-color LCD indicates in tune(GREEN) or out of tune(ORANGE), Built-in MIC and vibration sensor ensures optimum response, Auto power off energy saver mode optimizes battery life, Flat tuning-step to whole step. 4 position volume control (Mute, Low, Med, High)