Feature: 1. It can be used for Guitar, Bass, Violin, Ukulele, twelve equal temperament. 2. Beautiful and small appearance, easy to carry. 3. Super bright backlight, LCD display, providing excellent visibility. 4. High precision detection and sensitive vibration clamp. 5. 360 degree rotatable clamp can be adjusted according to the angle you need, simple and practical. Specification: Main material: ABS Product color: Black Product folding size: 50x40x25mm/1.96x1.57x0.98'' Product net weight: 21g Calibration range: AO(27.5Hz)-C8(4186.00Hz) Battery: CR2032 (includes battery) Note: Button batteries are usually placed outside the tuner. Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.