DOUBLE OS1 Resonance Pickup On-board Preamp SFT Same Frequency Trans Guitar Preamplifier System with Reverb Chorus Delay Rechargeable Li-ion Battery (Need Opening Holes to Install)

(Same Frequency Trans) guitar preamplifier is a masterpiece of innovation that has a transmission device, which drives guitar body to phonate when you are playing.;System pickup guitar sound when you are playing guitar, and drives guitar body through its custom transmission device. When operated without an amplifier, guitar body will increase its frequency response and guitar sound will be more resonant, solid, and dynamic.; preamp also has a DOUBLE reverb effect module that allows you to create innovative sound via transmission system driving guitar body.;Equipped with BT connection function, it can be connected to your cellphone and play with background .;It is a dual-pickup system with a piezo pickup and a microphone, system not only interprets every detail of play, but also adds extensity and dynamic to sound of guitar.