JOYO digital clip-on chromatic tuner has a a simple-to-read, multi-coloured, backlight, LCD screen to let you know if you are flat, sharp or in tune. Backlight LCD screen makes it easy to see under low light conditions. Extremely sensitive and accurate. Suitable for use with guitar, bass, mandolin, violin, banjo and other stringed instruments. Easy to carry or store in your instrument case.This tuner is great for tuning up in noisy surroundings as it clips to the head or body of your instrument and picks up the vibrations as opposed to the sounds transmitted in the air. Therefore it will only detect your instrument and not the person?s sitting next to you.Measures 65 mm length by 29 mm width by 36 mm height. A4 Frequency: 440HzTuning: ChromaticTuning Range: 0A(27.5Hz)-8C(4186.01Hz)Weight: 35gDimensions: 65(L)X36(H)X29(W)mmPower: CR2032 Battery (1)