Fosi Audio SK01: Headphone amplifier and preamplifier with battery

Fosi Audio SK01 is a new headphone amplifier with battery. RMS output power is up to 2400mW@32Ω. It has a volume control and a tone control.
Covering all your hi-fi needs

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Fosi Audio SK01 Headphone Amplifier & Preamplifier 2 in 1 for Headphone Earphone, Power Amplifier, Active speakers - AliExpress

Fosi Audio SK01: Headphone amplifier and preamplifier with battery

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Fosi Audio SK01 Headphone Amplifier & Preamplifier

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