1、BLUETOOTH MUSIC PLAYBACK: The 2 in 1 electronic digital metronome with metronome and Bluetooth music playback provides 10 meter range transmission and low latency. 2、RHYTHMIC RANGE: The Metronome tuner has a rhythmic range of 30 to 260bpm, with rhythm from 0 to 9, covering all the essential needs for developing rhythmic skills in any musical genre. 3、SIMPLE OPERATION: Turn on the Bluetooth of your cell phone or musical instrument with Bluetooth voice frequency output, search for the device "AM‑718" and pair it to connect easily. 4、1300MAH BATTERY: The Electronic digital metronome is equipped with a long lasting 3.7V 1300mAh lithium polymer battery for long hours of continuous use. 5、COMPACT AND PORTABLE: The Electronic vocal metronome is small and portable, easy to carry and use in the parks, on the patio and at home.