M-Audio BX4, Multimedia Reference Monitors, Tweeter: 1"" (25.4 mm) silk dome tweeter, Woofer: 4.5"" (114.3 mm), Kevlar diaphragm, Output power: 120 Watt, 2x 25 W (RMS), Frequency range: 69 - 22000 Hz, Inputs: 2x RCA, 2x 6.35 mm jack (TRS), 1x 3.5 mm stereo aux input, Headphone output: 3.5 mm stereo jack, Controls: Volume control, high and low EQ controls, speaker position switch, Housing made of coated MDF, Power consumption: 85 W, Power supply: Internal power supply 100 - 120 V / 220 - 240 V, 50/60 Hz, Dimensions per speaker (W x D x H): 156 x 175 x 225 mm, Weight per speaker: 2.23 kg, Includes 3.5 mm interconnect speaker cable, 3.5 mm to 3.5 mm jack cable and 3.5 mm jack to RCA cable