S-pro2 500Wx2 Top Audio Power Amplifier Board Power Amp Board Hifi Digital Amplifier Board Module Features: – Suitable for JBL PRX710 712 715 718 725 735 PRX812 815 818 825 835 – Series speaker power amplifier board – AC 110230V, 500W2 at 4ohm and 200W at 8ohm – Size: 215 x 80 x 52mm/8.5 x 3.1 x 2 (LxWxH) Package Included: – 1 x Amplifier Board. Usually it costs about 30USD-50USD. Thanks for your understanding. If you receive the item that not satisfied or defective, please do not open case and kindly notify us within 30 days.