Acoustic Trio
Simple Jack & power charger with L.R. Baggs acoustic guitar pickup

The Mi-Si Acoustic Trio System features an active, battery-free preamp designed specifically to work with the L.R. Baggs undersaddle Element acoustic guitar pickup. The preamp for this system uses Mi-Si's custom piezo linearization scheme, allowing for the most truthful and accurate sound from the
pickup. All you have to do is power up for 60 seconds using the Mi-Si Power Charger, providing you with up to 16 hours of performance time.