... system with amplifier Frequency: 2.4-2.483GHz Shortest Latency: <0.5ms Frequency response: 20-20Khz 2.1 speaker system with amplifier1 ... . Classic again, MDF & aluminium, built-in antenna, shortest latency (<0.5ms ... speaker structure, undertone stronger, output is 30W3. Black with red aluminium line, it is more fashionable.4. Volume part, ...