Wrist diameter:50 mm / 1.9 inchesWeight:47gWheel material:Translucent white polycarbonateCase material:Black polycarbonateBand material:Black silicone bandsBand sizes:The short band fits your wrist. The long band fits your arm and ankle.Model:SBP-02 with charging cableBattery type:Lithium batteryBattery life:More than 6 hours of metronome playbackSmartphone compatibility:www.soundbrenner.com/compatibilityConnectivity:Bluetooth 4.0Updatable firmware: Vibrating metronome: Capacitive touch: Tap tempo: Vibration motor: Adjustable tempo:20 - 400 BPMCustomize time signatures, subdivisions, and accents: Customize vibrations and LED lights: LED ring:8 RGB LEDsMultiplayer sync:Up to 5 devices with one phone, sync multiple phones via WiFi using Ableton LinkWearing positions:Wrist, arm, and ankle (short and long bands included). The body strap for the chest, shoulder, and thigh is available separately.Can be used with the free companion app or independently: Sync with DAW:In beta, learn more here: https://www.soundbrenner.com/daw-compatibility