Usage Tips:Description This is wind instrument tuner made by durable and safe materials, ensuring a full-bodied, authentic sound. It can greatly improve the sound you play. Fine workmanship and durable.With w ind instrument tuner, it can bring much help to you. Features -Color:Black -Material:ABS, plastic - Size: 10.00X6.30X1.80cm/3.93X2.48X0.71in - Size: 120.00X2.20X1.80cm/47.16X0.86X0.71in - Note: Without battery(2 x AAA battery). - A4 range: 430-450HZ -Product beat: -/4; 1/4; 3/4; 4/4; 3/8; 6/8 - Mode:Sound tuning mode; beat mode; and sound tuning mode - Beat error: 1% - Pitch error: 0.1% - Power supply: 3V -T he product is made of safe materials and has excellent durability. A variety of tuning modes can be switched for use. - High sensitivity tuner, the product is more accurate, accurate, convenient and fast. - The wind instrument tuner can be clipped to most boards. Small, convenient and portable - It is easy to adjust, convenient and practical, and can help you to practice and perform better. -Thewind instrument tuner is light in weight, easy to carry with you, and do not take up space. Package list: 1 x tuner 1 x pickup clip