NEXUS SPEAKER MS300TMH Mornitor Speaker Rated power: 40W Power Supply: 12V Control:Volume Knob*1 Audio Input:RCA connector*1 Impendance:8ohm Freq Resp.:200-6KHZ S.P.L.(1W/1M,1000HZ):120dB Waterproof grade: IP65 Size: 285W*205H*280L mm Material: ABS Horn and Metal Bracket