... for option.9) Color: red, black, gray or customization.10) Optional voltage: 12V or 24V.11) With plastic cover on both ends. WeiDa ... : BrandWeiDaModel No.WD-4002Usage Suitable for car, truck, motorcycle or homeVoltage(v)DC12 /24Size(mm)Ø 110*230Impedance(ohm)3.6Speaker ... Felt.9) Optional color: red, black, gray or customization.10) Optional voltage: 12V or 24V.11) With plastic cover on both ends. 4 ...