The Sony STR-K880 is a surround sound receiver that allows you to connect your TV, DVD/Blu-ray player, video game console, and other audio sources to create an immersive and cinematic listening experience in your home theater. With 2.1 channels of amplification (5 channels for the front, center, and surround speakers, and a separate subwoofer) and a rated power output of 140 watts per channel, the STR-K880 provides plenty of power and flexibility for your audio setup. It also includes a range of audio technologies, such as S-Force PRO Front Surround, Bass Reflex Subwoofer Enhancer, Cinema Quantum Dot technology for high-quality video, and compatibility with high-resolution audio formats like FLAC and DSD. Additionally, the STR-K880 has built-in Bluetooth connectivity for streaming music from your smartphone or tablet, and supports the latest HDMI specifications for 4K/HDR content playback. Overall, the Sony STR-K880 is a feature-packed and versatile surround sound receiver that offers exceptional audio and visual performance at an affordable price point.