PRODUCT NAME: WATERPROOF MOTORCYCLE AUDIO MODEL: MT473 BRAND NAME: AOVEISE OR OEM COLOR: BLACK & RED RATED POWER: 2*20W SPEAKER IMPEDANCE: 4~8 POWER SUPPLY DC12V OUTPUT: SPEAKER OUTPUT FREQUENCY RESPONSE: 100HZ~18KHZ6dB HARMONIC DISTORION: 5% FREQUENCY RANGE: 87.5~108MHZ SNR: 40dB INTERMEDIATE FREQUENCY: 10.7MHZ NOISE SENSITIVITY: 37dB SPEAKER SIZE: 3 INCH WATERPROOF LEVEL: IPX4 MATERIAL: ZINC ALUMINUM ALLOY NET WEIGHT: 0.82KG FUCTIONS: MUSIC PLAYER SMART PHONE CHARGER HANDSFREE CALL FLASH LIGHT FM USB BT(3.0) MP3 Model Name:MT473Waterproof Grade:IPX-4Item Size:21.0 cm * 28.0 cm * 15.0 cmMaterial Type:MetalWorking voltage:12VSpeaker:Two 3-inch full-range waterproof speakersFM radio:SupportOutput Power:20W*2BT Version:3.0Support USB/MP3:YesBrand Name:maxtoCertification:CEOrigin:Mainland ChinaType:Bluetooth Connection