Item Weight:3.2 ounces Package Dimensions:3.86 x 2.91 x 1.93 inches Batteries:1 CR123A batteries required. (included) Battery type:Lithium Chromatic Tuner with Guitar, Ukulele, Violin modes. Built-in rechargeable battery allows over 10 hours of continuous use per charge. High contrast color display with strong and flexible clip for the best viewing angle. Guitar tuner with auto power off function for maximum battery life. Package List: 1 * Tuner 1 * USB Cable 1 * User Manual NOTICE: This guitar tuner uses Li-Po battery , to reach the maximum battery life, please charge it before using it. If the tuner would not be used for a long time, please charge it at least once every 3 mouths to maintain battery health. [RECHARGEABLE ]: Guitar tuner comes with a lithium battery, which will last 10 hours on a single charge. There's also a battery level indicator on the display so you won't get caught out by flat batteries. The tuner has an auto off mode to help conserve the battery after 5 minutes of inactive use. [TUNING RANGE]: This little tuner is capable of tuning not only guitars, but also chromatic, ukuleles and violins. There's a tuning range of between A0(27.50 Hz) and C8 (4186.0 Hz). It's the largest range ever as guitar tuner on . [ACCURATE & STABLE]: Accurate to 1/1000th of a Semitone or 1/1000th of a Fret. Guitar tuner built in pickup to help block out any background noise that might interfere with tuning. Features Piezo sensors, which are highly sensitive coupled with a micro processor for fast and accurate tuning. [EASY TO USE]: Select your mode and start tuning. The guitar tuner will show yellow if the note is flat, red if the note is sharp and blue if you're accurate. It'll show you the note you're closest too and find which string you're tuning, which is all shown on the display. Choose our guitar tuner, Choose professional and fun! [WHAT YOU GET]: LIFETIME FREE REPLACEMENT. Just contact us via , no matter what question you meet while using this guitar tuner. [RECHARGEABLE]: Guitar tuner comes with a lithium battery, which will last 10 hours on a single charge. There's also a battery level indicator on the display so you won't get caught out by flat batteries. The tuner has an auto off mode to help conserve the battery after 5 minutes of inactive use. [TUNING RANGE]: This little tuner is capable of tuning not only guitars, but also chromatic, ukuleles and violins. There's a tuning range of between A0(27.50 Hz) and C8 (4186.0 Hz). It's the largest range ever as guitar tuner on . [ACCURATE & STABLE]: Accurate to 1/1000th of a Semitone or 1/1000th of a Fret. Guitar tuner built in pickup to help block out any background noise that might interfere with tuning . Features Piezo sensors, which are highly sensitive coupled with a micro processor for fast and accurate tuning. [EASY TO USE]: Select your mode and start tuning. The guitar tuner will show yellow if the note is flat, red if the note is sharp and blue if you're accurate. It'll show you the note you're closest too and find which string you're tuning, which is all shown on the display. Choose our guitar tuner, Choose professional and fun ! [WHAT YOU GET]: LIFETIME FREE REPLACEMENT. Just contact us via , no matter what question you meet while using this guitar tuner.