John Mayer JM 50W 100W

 Shenzhen Grand Technology Co. Ltd. is dedicated to the research and development of high quality musical instruments.
 The current product range includes custom electric guitar, bass, acoustic guitar, high-end handmade guitar amp, bass amp, pedal, drums, upright piano, acoustic piano, arylic glass piano, baby 152 piano, digital piano series, keyboard MIDI, live sound, DJ equipment, accessories.