Technical Specification: Speaker Material : Titanium Speaker 4-Way Sensitivity: 110dB (1w/1m) Impendence : 8 ohm Power Rms : Max 82Wx4 Reed : Titanium Speaker Weight (kg) : 2.65 Kg Solar Panel : 30W Battery : 12V -24ah Effective Area : Max 40x40mx2=8100m2 Speaker Housing Material : Stainless Steel Main control box : 550g/ 16x16x9cm