Type:Bluetooth Digital Power Amplifier BoardStyle:Bluetooth Digital Power Amplifier BoardDiy Supplies:ElectricalOrigin:Mainland Certification:NoneMaterimaterial::Plastic+metal AlExternal Potentiometer Size::Approx 118x100x38mm/4.6x3.9x1.5inchIntegrated Potentiometer Size::Approx 136x100x118x38mm/5.4x3.9x4.6x1.5inchStandard::External Potentiometer/integrated Potentiometer(optional)