stereo speaker model: sp-30a * p.m.p.o: 300w * frequency response: 80hz - 15,000hz * multimedia speaker * oem speaker for e-machines * supply power adapter * controls: volume,power,led, * magnetic shield * compatible with personal, micro computer and sound card, cd player, walk-man * powerful bass sound certificate: rohs pakcing:colorful box delivery lead time:within 30 days payment terms:t/t, l/c(us$15,000+)