Edifier R1280DB Black 2.0 Bookshelf Speakers Bluetooth Optical Input 42 Watts Black Wood Product Features: TOTAL POWER OUTPUT R/L: 21W+21W RMS NOISE LEVEL: ≤25dB (A) FREQUENCY RESPONSE: 55Hz-20KHz TWEETER UNIT: Φ13mm silk dome tweeter BASS UNIT: 4 inch (116mm) SIGNAL-TO-NOISE RATIO: ≥85dBA (A) 5.75in x 9.5in x 7in (WxHxD) Includes: Speaker Wire, Remote Control, RCA Audio Cables, 3.5mm to RCA Cable, Fiber Optic Cable AC Universal 100-240V, 50/60HZ