Compact clip tuner with patented auto operation. 4 pressure sensors detect when the tuner is clipped to a surface, such as a guitar headstock, activating the tuner. Removal or inactivity for 5 minutes automatically switches the tuner off. Display is virtual needle type with 3-colour backlight for flat, sharp or in-tune. Accurate and convenient tuning for guitars and other instruments.Tuning[tab]Auto chromatic[br]Power supply[tab]3Vdc (1 x CR2032 supplied)[br]Backlight[tab]Orange (flat), Green (in-tune), Red (sharp)[br]Display[tab]LCD virtual needle with note[br]Input[tab]Piezo contact pickup[br]A4 frequency[tab]440Hz (fixed)[br]Tuning range[tab]A0 - C8[br]Tuning stability[tab]±1cent[br]Dimensions[tab]30 x 48 x 40mm[br]Weight (without battery)[tab]22g