The difference between B701 and B701D is that B701 unit doesn't have a HDMI port and there is no HDMI cable to connect your TV and sub-woofer. BOBTOT Provides Assistance on All Our Home Theater System Surround Sound Speakers Audio ProductsWe are 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 B701 Surround Sound System Home Theater Speakers, please check the user manual, or send a message via Buyer to Seller on your order page for further assistance. We are always here for you!Bobtot B701 Surround Sound System Home Theater Bluetooth Speakers for TVBOBTOTMultimedia SupportSurround Stereo SoundSupport Bluetooth ConnectionFull Functions Remote ControlAbout BOBTOTBobtot focuses on multimedia audio technology, designs and manufactures hundreds of different home speakers for every speaker application, aiming to provide consumers with high-quality home surround sound needs solutions. All of our products achieve ROHS, FCC, CE Certification.Product Features:5.1 Channel Surround Stereo Sound System800 Watts Peak Power6.5'' Subwoofer with built-in receiverOptical input for universal TVs2 ¼'' MIC Inputs with Echo function for karaokeUSB / SD inputPlug and play system, simple to useMultimedia Support/Multiple ApplicationThe volume of each speaker can be independent controlAdditional cables, include Optical cable / Coaxial cable / AUX cable / RCA cables / Antenna cable, can support any application in your need. Tips: Before normal work, please remember to plug the Five Speakers into the "AUDIO OUTPUT" slots of the back panel of the Subwoofer. (The length of the built-in cable can distinguish the type of speaker)B701 Home Theater Speakers Front Function PanelStandby/INPUT: Input function key, switch modes among bt/OPT/COA/DV/AU/FM/USB.5.1/2.1: 5.1/2.1 channel function key (If need the sound output from five speakers, please don't forget to switch to 5.1 channel; In the 2.1 channel, only two front speakers have sound output.)AUTO/Pause: USB/SD Pause/Play function key, when the FM state when the automatic search and save the radio station(In Bluetooth Mode, you could long-press this button to disconnect the Bluetooth)VOL-/VOL+: You could decrease/increase the total system's volume via Front Function Panel or via Remote (The volume of the subwoofer and each speaker can be independently controlled via Remote, such as FL±, FR±, SW±, CEN±, SL±, SR±)CH-/ CH+ : Previous/next function key, previous/next song when USB/SD input; previous/next channel when FM input5.1 Channel Surround Sound StereoConnect via Bluetooth Name "B701"Clear Sound Quality & Rich BassEnjoy a Cinema-like Visual Feast At HomeExperience a Real Sense of Direction When GamingParty Karaoke At Home With Friend and FamilyB701 Home Surround Sound Speakers SpecificationsInput Voltage120V/60HZFrequency Response20Hz - 20KHzAmplifierClass AB, amplifier with top componentsSignal to Noise Ratio≥70dB (Maximum output with THD+1<1%System Impedance6.5" driver: 8 Ohm/3" driver: 4OhmWired Satellate SpeakersCable Length-- Front Speakers L/R: 4M Rear Speakers L/R: 10M Center Speaker: 3MSubwoofer Dimensions(W*H*D) W198xH330xD318 mm5 Speakers Same Dimensions(W*H*D) W104xH180xD102 mm