ABS-710Y (can be changed without Bluetooth U disk according to requirements, only active sound column with sound source input and potentiometer tuning) Rated power: 15W Sensitivity: 91dB±3dB Input voltage: 220V Frequency response: 120-18000Hz Speaker unit: 4""+0.5"" treble Dimensions: 155 x 105 x 270 (mm) Packing size: 420*420*340mm, 4 pcs/carton Weight: 2kg, Active sound column is a smart Bluetooth sound column host with APE digital decoding and high-fidelity power amplifier system; professional integration and high-strength waterproof design, the sound column cover adopts embedded built-in high-fidelity stereo digital power amplifier technology, sound quality Delicate and powerful, it adopts light touch buttons and infrared to control various functions. The speaker body is made of aluminum alloy and fireproof ABS upper and lower covers processed by imported technology. The portable infrared remote control makes the operation more convenient; through the Bluetooth audio transmission function, it can be connected with devices such as smart phones or iPads to easily receive audio information from digital mobile devices; The avant-garde APE digital audio decoder chip and built-in high-fidelity stereo digital power amplifier provide customers with a true Hi-Fi audio experience. External USB, TF card, line, microphone audio input and other ports, with 1 signal amplification output, used for Connect the same auxiliary sound column. ABS-720Y Rated power: 25W Sensitivity: 91dB±3dB Input voltage: 220V Frequency response: 120-18000Hz Speaker unit: 2x4""+0.5"" treble Dimensions: 155 x 105 x 385 (mm) Packing size: 470*420*340mm, 4 pcs/carton Weight: 3kg With 4.0 high-speed bluetooth, USB, SD card, line 4 kinds of input, with remote control, with 1 signal amplification output, used to connect the same parameter specification 8 ohm fixed impedance ABS-720Y sub-speaker ABS-730Y Rated power: 35W Sensitivity: 91dB±3dB Input voltage: 220V Frequency response: 120-18000Hz Speaker unit: 3x4"+0.5" tweeter Dimensions: 155 x 105 x 505 (mm) Packing size: 585*420*340mm, 4 pcs/carton Weight: 4kg With 4.0 high-speed bluetooth, USB, SD card, line 4 kinds of input, with remote control, with 1 signal amplification output, used to connect the same parameter specification 8 ohm fixed resistance ABS-730Y sub-speaker ABS-740Y Rated power: 45W Sensitivity: 91dB±3dB Input voltage: 220V Frequency response: 120-18000Hz Speaker unit: 4x4""+0.5"" tweeter Dimensions: 155 x 105 x 620 (mm) Packing size: 705*420*340mm, 4 pcs/carton Weight: 5kg With 4.0 high-speed bluetooth, USB, SD card, line 4 types of input, with remote control, with 1 signal amplification output, used to connect the same parameter specification 8 ohm fixed impedance ABS-740Y sub-speaker