The StroboPlus HD is an ultra high-resolution strobe tuner with Peterson's largest illuminated display ever featured in a traditional strobe format. Chromatically tune any instrument confidently to exacting standards or use any of the 90 sweetened tunings that are developed and optimized for your specific instrument. Use the built-in mic, plug in, or use a clip-on pickup to tune your instruments quickly with its smooth, real-time display or program your custom tunings using the Peterson Connect online utility. Operates on a USB rechargeable lithium-ion battery. Via a simple firmware update, the StroboPlus can be upgraded to include the Peterson BodyBeat Sync metronome (see PetersonTuners.com for details).