PH1 is a high-performance audio decoder and headphone amplifier. The body is made of aluminum alloy (the surface is oxidized and colored), and the appearance is small and exquisite. It uses a high-performance decoding chip, has a 3.5mm single-ended and 4.4 balanced dual output interface, and can output up to 220mw power, easily driving headphones below 300 ohms. Signal-to-noise ratio, distortion, dynamic range and other parameters are naturally excellent. The tone is balanced/clear, with a tube amplifier flavor. Balanced tone Warm and natural: The tone is balanced and warm, and it is tolerant and peaceful, with a tube amplifier sound texture and comfortable listening. The tone is natural, the low frequency is thick, and the mid-high frequency is transparent and delicate. Support: iOS, Android, Mac, Windows. PH1 supports plug-and-play, no driver installation required, and is compatible with multiple platforms such as iOS, Android, mac, windows, etc. Two modes: high and low impedance. PH1 has high and low impedance modes, which can easily drive headphones with impedance below 300 ohms. Whether it is high-impedance headphones or low-impedance headphones, it has excellent sound quality performance. It has a single-ended 3.5mm interface /4.4 balanced interface, compatible with most headphones, providing you with more choices. Total harmonic distortion + noise: SE: 0.0006% (32Q) BAL: .001% (32Q) Output power: 3.5MM: 120MW (32Q) 4.4MM: 220MW (32Q) Signal-to-noise ratio: 120dB Frequency response: 20Hz-20KHz 0.5dB Sampling rate: up to 16bit/48kHz Distortion: 0.03% Dynamic range: 120dB Recommended headphone impedance: 16-300Q Dual headphone output: 3.5mm single-ended output 4.4mm balanced output Supported devices: Mac/Windows/iOS/Android Color: Black Material: Metal+Plastic Package Contents: 1 * Audio Decoder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little