Product description:Operational amplifier chip: NE5532*2Replaceable op amp chip: OPA2604, OPA2314, LM4562, NE5532, etc.Signal to noise ratio: ≥111dbFrequency response: 20-20Khz (±0.1db)Distortion: 0.03%Load impedance: 16-300ΩMaximum output power: 170mW/32Ω loadInput mode: AUXSupport equipment: mobile phones, tablets, computers, MP3, TV, etc.Output mode: amp, earphone,...