Accessories for metronome. Introducing the Peterson Body Beat Pulse Solo. This rechargeable active clip-on device gives every electronic metronome the capability to silently convey tempo. Connect the standard 3.5 millimeter stereo plug and give your favorite metronome whole new level of functionality. The Body Beat Pulse will even work with the metronome apps on your mobile device. Use the pulse with the Peterson Body Beat Metronome App and you'll also feel three different levels of intensity for downbeats, accents and subdivisions.