2.1 sound speaker Frequency: 2.4-2.483GHz Shortest Latency: <0.5ms Frequency response: 20-20Khz 2.1 sound speaker 1. Classic again, MDF & aluminium, built-in antenna, shortest ... (<0.5ms), 10 meters wireless transmitter.2. Subwoofer: Material is MDF, horizontal designed, 2.1 audio, 5.25 speaker structure, undertone stronger, output is 30W3 ...