Onkyo LS3100 Envision Cinema 2.1-Channel Bluetooth Speaker System (Discontinued by Manufacturer) Digital Amplifier Circuitry to Maintain Clean Audio Signals Auto Power On/Standby with TV Clear, Room-Filling Sound Reproduction with SRS Technology Bluetooth Version 2.1 +EDR for Wireless Audio Streaming from Compatible Smart Phones, Tablets, and Personal Computers Preset Remote Control Code for Most TV Brands and Learning Capability