LCD Clip-on Digital Electronic Acoustic Bass Guitar Tuner Quick OverviewIt is a ideal electronic tuner to adjust intonation for acoustic guitar， bass， mandolins， banjos，violins and more.Small and compact design， you can bring it anywhere to use.Red and green backgroundlight，so that use it both in daytime and night. It swivels into the angle that is easiest for you to read.Specifications:Tuning range: 12-note full range chromatic， 0A - 7C.Tuning mode:Automatic.Calibration range:430Hz-450Hz.A4 Frequency range:440HzHigh-precision LCD needle-type meter for stable tuning.LCD Display:Color black-light display.Turning method:choose built-in microphone or clip it to the fret before select "CLIP"or "MI".Built-in vibration sensor.Turning mode:G(Guitar)，B(Bass)，V(Violin)，C(Chromatic).Detection Accuracy: 5%.Automatically power off if no signal is received in 3 minutes.360 degree freely rotate.Power supply:1 x coin battery(CR2032)(not included).Dimensions:80x53x43mm(main body).Colour:blackPackage included:1 x Guitar Tuner1 x User ManualUnit net weight:46gUnit packing gross weight:60g