1. VOICE COUNTER SWITCH: Bluetooth speaker metronome with voice counting switch, powerful sound and clear LED tempo indicator. Headphone jack for click practice and seamless performances. 2. VARIOUS BEATS: The digital metronome features a tempo range of 30 to 260 beats per minute, 10 beats including 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 8 rhythm patterns. The metronome function covers all the essential requirements for developing rhythm skills in each music genre. 3. BLUETOOTH METRONOME: Beat, sounds, and music playback. Turn on Bluetooth from your phone or instruments with Bluetooth sound output, find the device AM 718 and pair it. The Bluetooth metronome has beat sounds and Bluetooth music playback. Bluetooth 5.0 provides a transmission range of 10 meters and low latency. 4. CHARGING METHOD: Digital Bluetooth metronome with built in large capacity lithium battery, 2 hours charging time provides 10 hours of playtime. Included is a USB Type C cable for convenient charging anywhere, anytime.