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DIY Classic DA47 Headphone Amplifier Circuit Board Kits DC 3.7V To 30V Single Power Portable HIFI AMP Amplifier Module
Specification: Using a single power supply, such as USB 5V, 12V, 30V car work Power supply votage: DC 3.7-30V Size: 93*55*25mm(length*width*height) Impedance: 47K OP-AMP: NE5532P Power plug size: 5.5*2.1mm(length*width) Note: This is DIY kit, you need to solder it by yourself. Package included: 1 X DIY classic DA47 headphone amplifier circuit board kits