Universal power supply (100-240V) Calibrated flared bass reflex port, in front of the speaker cabinet Dual RCA inputs for connectivity to multiple audio sources 100% MDF wooden enclosure Active bookshelf speaker system with 42W total power output Bass, treble and master volume dials located on the side panel Wireless remote control for volume adjustment and muteTotal power output:21W x 2 Signal to noise ratio:85dBA Input sensitivity:PC: 750mV ± 50mV | Aux: 550mV ± 50mV Distortion:0.05% Audio input:Dual RCA input (RCA - RCA and RCA to AUX) Adjustment:Volume, bass and treble adjustment, remote control Subwoofer / bass unit:4 inch (106mm) Magnetically shielded, 6Ω Tweeter unit:13mm silk domed tweeter, Magnetically shielded, 4Ω Weight:4.9Kg Net | 5.65Kg Gross Dimension:146mm x 234mm x 196mm (WxHxD)