This is a portable and universal used to tune Guitar, violin, Bass and Ukulele. This is a good option for you to keep your instrument in Tune. Get one before you run out of supplies. Feature - Color: Black. - Material: Silicone and ABS. - Size: About 4 x 2.8 x 1.4cm/1.57x1.1x0.55 inches. - Tuning items: twelve equal temperament (C)/Ukulele (U)/ guitar (G)/bass (B)/violin (V) - Pick up range : (27.5Hz) ~C8 (4186Hz) - Tuning: Vibration tuning - Tuning error: - Weight :20g (without batteries), 30g (with batteries) - Power supply: 1 x battery - Accessories: package, battery, Instruction in Chinese and English - Made of materials fro durable long time use. - LED display light, clear pattern, intuitive and convenient. - , strong and durable, easy to operate. - Silicone pads protect the body from damage. - Intelligent tuning, stable performance of both backlights, automatic shutdown minutes of static operation. Package list: 1 x Guitar