Type side panel control with frequency and vibration pickup, with DOUBLE import metallization of piezoelectric thin film pickup sticks and microphone pickup, with volume, timbre, mike risk control system, as well as reverb, chorus and delayed effect, also has the ultra low, low, the high and ultra high eight-way timbre fine-tuning, etc; Phase switch, power low voltage display, with 18650 rechargeable batteries, battery pack, support USB charging.