Feature: 1. 3 In 1 Device: The Metronome tuner combines a tuner, a metronome, and a tone generator, all housed in a stand up and pocket size device with a 500mah battery. 2. With Vocal Counting: The metronome is built with vocal counting for more concentrative practice and let's you adjust your desired tempo quickly and easily. 3. Pickup Way: Built in microphone pickup and external pickup clip, foldable bracket is easy to use. Small and delicate appearance, easy to carry. 4. Easy To Read: Metronome tuner with large display, user friendly, especially in dark environment. Adjustable volume makes it possible to practice at your preferred environment. Professional and easy to use. 5. Sturdy And Durable: Built strong and resistant for beginners and professionals. This tuner metronome was built to last for long time. Specification: Item Type: Ueteto Metronome Tuner Product Material: Plastic Weight: Approx. 152g / 5.4oz Battery Capacity: 500mah Battery Type: Lithium Battery (Shipped With Built In Battery) Tuning Range: A0(27.5hz) To C8(4186.0hz) Music Calibration Items: Twelve Equal Rhythm, Guzheng, Guqin, Pipa, Dulcimer, Erhu, Banhu, Jinghu, Zhongruan, Morin Qin, Liuqin Tone Adjustment Mode: Manual Tone Adjustment, Automatic Tone Adjustment. Package List: 1 x Metronome Tuner1 x Pickup Clip1 x Charging Cable