The Sony STR-DE997 is a 7.2 channel AV receiver that delivers high-quality sound and advanced connectivity options for your home theater system. Some of its key features include:1. Support for Dolby Atmos and DTS:X format for a more immersive and realistic 3D audio experience.2. Built-in Wi-Fi, Bluetooth, and Chromecast built-in for streaming from your favorite services like Netflix, Amazon Prime Video, and Spotify.3. Easy setup with the Av Receiver Setup Assistant and Quick Start Guide.4. Support for High Resolution Audio playback, including FLAC, ALAC, and WAV files up to 24 bit/192 kHz.5. Phono input for connecting a turntable..6. High-current power transistors and low-jitter digital circuitry for clear, powerful sound.7. Multi-zone audio capabilities, allowing you to play different sources in different rooms simultaneously.8. Support for Apple AirPlay 2, enabling you to stream audio throughout your home using your iOS devices.9. Compatibility with Alexa and Google Assistant for voice control of your home theater system.10. Eco mode and Auto Calibration to reduce power consumption and optimize audio performance, respectively.These features make the Sony STR-DE997 an excellent choice for anyone looking to enhance their home theater experience with advanced connectivity, ultrahigh-resolution audio, and immersive surround sound.