Feature: 1. High‑quality materials, safe to use, food‑grade PC shells, non‑toxic and harmless, safe to use. 2. Environmentally friendly and durable, frosted technology, resin rubber, more durable, reducing fingerprint residues and enhancing non‑slip performance. 3. 360‑degree omni‑directional tuning, metal inner shaft, tuning is more convenient. 4. The LED high‑definition display screen, clear pattern, intuitive and convenient, and durable. 5. Small in size and light in weight, convenient to carry and use at any time, very convenient and practical. Specification: Item Type: Guitar and Bass Tuner Material: ABS resin, rubber and PC Colour: Black Battery Type: Button battery x 1 (delivered with supporting battery) Battery Model: CR2032 Battery Capacity: 180mAh Tuning Project: Guitar Bass A4 Range: 410/490Hz Signal Detection Speed: <20 milliseconds. Package List: 1 x Guitar and Bass Tuner1 x Button Battery1 x User Manual Note: 1. Avoid using it in harsh environments such as high temperature, humidity, and below zero.2. Avoid using under strong light.