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 TunerProduct Material: PlasticWeight: Approx. 152g / 5.4ozBattery Capacity: 500mahBattery 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, LiuqinTone Adjustment Mode: Manual Tone Adjustment, Automatic Tone Adjustment.Package List:1 x Metronome Tuner1 x Pickup Clip1 x Charging Cable