Klipsch Premium 2.1 Home/Portable Wireless Bluetooth Music System with Built-in Subwoofer - Black KMC 3 NA BK Type: Speakers Color: Black Specifications: Amplifier Power: 2x15W RMS (full range drivers) 1x35W (subwoofer) 130W system peak power Bi-Amplified for audiophile resolution Battery Life: Default Volume: 26 hours - Max Volume: 8 hours Battery Type: 8 D cells, alkaline or rechargeable Crossover Frequency: 380Hz Dimensions: 7.2 H (18.3cm) x 17 W (43.2cm) x 5.5 D (14cm) Enclosure Type: Bass-reflex Finish: Soft-feel paint with high-gloss metallic accents Frequency Response: 45Hz-24KHz +/-3dB/useable bass to 40Hz (f6) Inputs: Bluetooth, 3.5mm Analog In, Charge-only USB port Low Frequency Driver: 5.25 (13.3 cm) Long-Throw Woofer Max Acoustic Output: 105 dB (0.5m near field) Mid/High Frequency Driver: 2 (5.0 cm) Aluminum Diaphragm Fullrange Weight: 7.8 lbs (3.5 kg)