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Kanto YU5GB Premium Bookshelf Speakers with aptX Bluetooth 4.0 Gloss Black

2x Optical Audio Inputs aptX Bluetooth 40 Input 35mm mini-jack AUX Input RCA LR Input Subwoofer Output USB charge port 5V 1A Active to Passive Knurled Speaker Binding Posts
1 inch Silk Dome Tweeter 525 inch Kevlar Driver Acoustic Grade MDF Cabinets 2 inch Rear Bass Port
4 Ohms Nominal Impedance 87 dB Speaker Sensitivity Class D Amplifier 40 Watts RMS per channel 80 Watts Total
550 mV Input Sensitivity
Auto-switching power supply for 100V-240V 5060 Hz