... : <0.5ms Frequency response: 20-20Khz 2.1 speaker system with amplifier1. Classic again, MDF & aluminium, built-in antenna, shortest ... 5.25 speaker structure, undertone stronger, output is 30W3. Black with red aluminium line, it is more fashionable.4. Volume part ... Ω,15W; Lower: 5 inch,4Ω, 30WLower controler: yesInterface: 2.4Gwiress receiver,4RCA audio slotPower adopter: 220VLine size: 1.5-2 meters