Features: 1.SENSITIVE AND ACCURATE: Clip on tuner with advanced microprocessors and highly sensitive sensors will ensure that your instrument is tuned quickly and accurately. 2.BACKLIGHT: This clip on tuner has a two color backlight, green for in tune and white for out of tune. Easy to use, turn it on, clip it on, and you're can tune. 3.ANTI INTERFERENCE: Because guitar tuner detects pitch directly from the vibration of the instrument, it will never be disturbed by ambient room noise. 4.MULTI MODE: This digital tuner features 12 equal temperament, guitar, bass, violin, and ukulele tuning programs to meet your different usage needs. 5.PORTABLE AND DURABLE: The electronic guitar tuner is compact and lightweight, easy to carry around for practicing or performing, Made of ABS material, wearable and durable. specification:Item Type: Clip On Guitar Tuner Material: ABS Tuning Programs: 12 Equal Temperament; Guitar; Bass; Violin and Ukulele A4: 440Hz Battery Type: 1 x CR2032 Button Battery (Ships without Battery) Color: Black PackageList:1 x ClipOnGuitarTuner 1 xInstruction Manual