The WiiM Amp is an all-in-one network player that connects to the internet and plays high-quality music simply by connecting the power cable and speaker cables. Unlike the WiiM Amp Pro and WiiM Amp Ultra, it uniquely supports Apple AirPlay 2, allowing you to play audio directly from your smartphone through the speakers. Based on my testing, the sound quality of all three models is similar, with only slight differences due to automatic frequency correction. Therefore, the WiiM Amp, available at this price point, offers excellent cost performance. It recently added support for YouTube Music. I enjoy using it with Amazon Music. Although there are some scratches on the bottom due to it being a used item, they are hardly noticeable once installed and it looks clean. All accessories are included. Accessories: Power cable, remote control, HDMI cable, RCA cable, optical cable Dimensions and Weight: 217 mm x 190 mm x 64 mm, 1.84 kg Color: Space Gray Power: 120 W 4Ω, 60 W 8Ω Audio Input: HDMI Arc, Optical, Line Audio Output: Passive speaker terminal: SNR - 98 dB, THD+N - 0.0025% (-92 dB); Subwoofer output with bass management. Audio Formats: MP3, AAC, ALAC, APE, FLAC, AIFF, WAV, WMA, OGG Subwoofer Output: RCA Power Supply: 100-240V 50/60Hz Network: IEEE 802.11 b/g/n/ac Dual band Wi-Fi Bluetooth: BT 5.1, A2DP Sink and Source, AVRCP, BLE HID Supported Streaming Protocols: AirPlay 2, Google Cast, Spotify Connect, TIDAL Connect, Qobuz Connect, Alexa Cast, DLNA, Roon Ready