Kindly remind, the difference between B901 and B901D is that there is no HDMI port on the back panel of the sub and there is no HDMI cable to connect your TV and sub-woofer.BOBTOT Provides Assistance on All Our Home Theater System Speakers Audio ProductsBobtot is committed to providing the best purchasing experience to our valued customers. Your satisfaction is our greatest pursuit！When you encounter problems with the use of the B901 Home Speakers, please check the User Manual. We also strongly advise you to send a message to us via the Buyer to Seller message for further assistance. We are always here to service you!Multiple Application Scenarios for Multimedia include TV, Game Console, DVD, Computer, Laptop, ProjectorHome Theater Audio Surround Stereo Sound Speakers for Multiple ApplicationHigh Sound QualityHome theater speakers can reach up to 1200 watts of power, 10 inch subwoofer with built-in receiver provides super clear deep, rich bass with no rattling or discernible distortion even at high volumes.Bluetooth 5.0 for Bluetooth DeviceBluetooth 5.0 makes signal transmission faster and connection more stable. Make sure the item power "ON" > Press the INPUT button until the digital read-out shows" BT" > Search for "B901" and connect.5.1/2.1 Channel Surround Stereo SoundSurround sound speakers has two modes of 5.1/2.1 channel, please notes that 2.1 channel mode only outputs sound from two front speakers. LED Light Effects make great atmospheric.Front Function PanelMultiple Function Panel allows you directly operate the system when the remote is not around. Such as the INPUT function button, 5.1/2.1 channel select button, Song Switching button, and Volume Adjustment.Long Built-in Cable ConnectionHome Theater Satellite Speakers with Long Built-in Cable to Connect with the Subwoofer. Additional cables include Optical/Coaxial/AUX/RCA Cable to support any application in need.Full Function RemoteLong press "LED-Light" to turn on/off the LED light of 5 small speakers; Short press to change the LED lighting modes of the Subwoofer or turn it off. Press the FL±, FR±, SW±, CEN±, SL±, SR± to control the volume of the subwoofer and each speaker.Surround Sound System with Optical/Coaxial Audio Input for Multi-type TVsB901 Home Theater Speaker SpecificationsCable Length of SpeakerFront speakers L/R: 13 ft, Rear speakers L/R: 31 ft, Center speaker: 10 ftSubwoofer Size(W*H*D) 9.25” x 14.57” x 18.11”Center Channel Speaker Size(W*H*D) 14.57” x 3.94” x 4.53”Front L/R Channel Speaker Size(W*H*D) 3.94” x 14.57” x 4.53”Rear L/R Channel Speaker Size(W*H*D) 3.94” x 9.25” x 4.53”Shipping Dimensions(W*D*H) 27.55” x 13.38” x 23.23”Net Weight36.38 LBS (15.6kg)AmplifierClass AB, very efficient amplifier with top componentsPeak Power1200 WattsInput VoltageAC 120V/60HzFrequency Response20Hz - 20KHzSystem Impedance10" driver: 8 Ohm/3" driver: 4 OhmSignal to Noise Ratio≥70dB (Maximum output with THD+1