Features: This a small metronome that even with its small size produces a clear loud sound for convenientusage. With a builted in rechargeable lithium battery, it can used for long durations and can rechargedusing the convenient USB adapter. Professional small digital metronome, universal for most instruments that need beat or tempos, easy to use. Clip & lanyard hole design for convenient carry and easy to fix. Clear LCD display and indicator light, with "select" & "up" or "down" adjuster for Rhythm Types, Tempos, Beat & Volumes. Specifications: Component: ABS Color: Black/White/Pink/Surfing Green/01 Color Size: about 4.8x4x2cm/1.89x1.57x0.79inch Battery: Builted in 4.2V lithium battery Speed: 30-250bpm Beat: 0.1.2.3.4.5.6.7.8.9 Package Includes: 1Pc Small Electronic Metronome note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.