The ENO ET-33 is a professional and practical mini digital LCD guitar tuner, which features a super-bright, multi-colored LCD screen that is easily visible while attached to the instrument's headstock in any lighting situation. Screen color changes to green when correct tuning has been reached, allowing quick and accurate tuning at a glance. The tuner has separate settings for Chromatic, Guitar, Bass, Violin, Ukulele, and can be set for about 440Hz operation. The ET-33 can be attached easily to any stringed instrument and also tilts and swivels for easy viewing from any angle. Features - Brand: TINKSKY.- Model: ENO ET-33.- Color: mainly black.- Shell material: durable hard plastic.- Dimension: about 45 x 41 x 30 mm.- and Mini Clip-on Digital LCD Guitar Bass Violin Ukulele Chromatic Tuner.- Great way for you to tune either your guitar, bass, violin, ukulele or chromatic with ease.- Works on mechanical vibration sensor, allowing accurate tuning in noisy environments.- It also comes with a chromatic setting giving it a vast tuning range.- The clip has been designed to allow the tuner to turn by 360 degrees.- It also has a white and green backlight, for easy to read.- It will auto shut down after 3 minutes when not in use, for saving power. Specifications - Tuning mode: Auto.- Tuning items: Chromatic, Guitar, Bass, Violin, Ukulele- A4 frequency: 440Hz.- Tuning range: A0(27.5Hz)-A6(1760Hz).- Power supply: 1 * CR2032 lithium battery (not included). Notices 1. Avoid rough handling and heavy operation.2. Please use clean and fiber to maintain the machine, no use of water or chemical liquid.3. When the display is not clear, change the battery with a new one.4. Please take the battery out when not use for a long time.Packing list: 1 * TINKSKY ENO ET-33 Mini Clip-on Digital LCD Chromatic Guitar Bass Violin Ukulele Chromatic Tuner (Black)