Features Specifications:karaoke speaker (OK-280A)  Model:OK-280A * Loudspeaker type:4-way full range bass reflex coaxial system *Frequency response:30Hz-20KHz *Power handling:500W RMS/900W program *sensitivity at 1W/1M:102dB *Norminal dispersion:90×60°H×V *Crossover:4-way PTC cut frequecny 2KHz *Speaker unit:Tweeter×2+woofer 8×2 *Recommend for a large-sized room or a bar or Hall that requires vocal clarity *karaoke speaker system