AK390 Digital Audio Amplifier – Powerful, Versatile, and Compact • 800W Rated Power: Fully upgraded design delivering 400W + 400W output, ideal for driving 4–16 ohm passive speakers. Suitable for use in small apartments, bedrooms, offices, basements, and garages. Compact size fits neatly into bookshelves or AV cabinets for spacesaving convenience. • Bluetooth 5.0 Connectivity: Builtin Bluetooth 5.0 core ensures stable wireless streaming with no pops or background noise once connected. Designed for users who value fidelity audio for music, movies, and entertainment. • Karaoke and FM Radio: Equipped with microphone input so you can enjoy karaoke sessions with friends and family in the comfort of your home. Includes FM radio functionality, providing easy access to local stations for news, sports, and music. • Multiple Input Options and Mode Memory: Supports Bluetooth, AUX, MIC, USB, and RCA inputs, making it compatible with CD/DVD players, TVs, PCs, tablets, smartphones, MP3 players, and projectors. The mode memory feature remembers the last input used, ensuring quick startup in your preferred mode. Suitable for indoor and outdoor events, parties, vehicle setups, and educational or classroom use. • Precision Sound Control: Frontpanel knobs for master volume, treble, and bass allow fine tuning to suit your preference. Includes remote control for convenient audio adjustments from a distance. Note: Please remove the isolation plastic sheet from the bottom of the remote control before first use. Example use scenarios: 1. Transform your living room into a mini home theater with powerful, clear audio for movies and streaming. 2. Host karaoke nights with family and friends, using the microphone input to bring fun and interaction to gatherings. 3. Enhance a classroom or workshop with reliable amplification for presentations, lectures, or multimedia activities.