Dual system where the Shadow combines a magnetic NanoMAG pickup at the end of the fingerboard and a Nanoflex in the saddle, which provides unbeatable dynamics and an amazingly clean sound. Easy to install and simple to use. There is a blend control where you balance the levels of the two mics, a phase switch, a volume control, and a tone control. Runs on 2 x 3V lithium batteries and has a light that warns of low battery level.