Please Note 1. For optical connections, please change your TV audio output to PCM (also called SPDIF). 2. Pls make sure the protective caps at the ends of the optical cable are removed before plugging it in. 3. Pls switch the bookshelf speakers to OPT mode- led shows white. Package Included 2× 4 inch Bookshelf speakers（Model SR04） 1×Power adapter 1×Digital optical cable 1×RCA to 3.5mm Cable 1×Remote control 1×User manual 1×Service card 1×Speaker connecting cable For any questions or technical support, pls feel free to contact supportbestisanor ask through Q/A directly.

Superior Sound – Fill your room with powerful sound with its 50W continuous power, 13mm silk dome tweeter unit, and 4-inch 116mm bass unit. These speakers are designed to produce a natural, well-balanced sound with massive bass
Wireless Bluetooth 5.0 Transmission – Built-in Bluetooth technology lets you stream music, videos and movies directly from your smartphone, tablet, Mac or other compatible devices, no need to deal with messy wires
RCA/Opt/Coax Inputs& Speaker Out &-Optical, coaxial and RCA inputs to ensure a lossless connection to TVs, turntables, and computers. A speaker-out port for connecting an extra active subwoofer to increase extra bass and punch
3 Equalizer Modes with Dual Control – Built-in DSP chip, the SR04 bookshelf speaker provides 3 equalizer modes: dialogue, movie, and music, brings you an upgrading fantastic home theater experience. Easy to control volume, switch input way, adjust bass/treble on the back panel and remote control
100% Satisfaction Service- Bestisan offers lifetime technical support. Any questions or suggestions, pls freely email us for help. We will give you back within 24 hours
Included components: bookshelf speakers; remote control; rca to rca cable; stereo rca to 3.5mm audio cable; rca to rca audio cable; digital optical cable; power adapter; quick start