Specification:Brand: AUTSOMEColor: BlackModel:AK45Voltage: DC 12V or AC 90-240VImpedance: 4-16 u03a9Bluetooth: SupportRMS power: 40Wx2Peak power: 90W x2Channel: 2.0SNR: 85 dbFM Frequency: 87.5-108MHzFrequency: 10Hz-20KHzSize: Approx. 18x14x6.5cm/ 7.09x5.51x2.6""Model: AK-45Size: 18*14*6.5CMRated voltage: 12-240VRated power: 40W*2Rated frequency: 20-20KHZResolution: 47KDistortion rate: 0.50%SNR: 85DBImpedance: 4-16u03a9Amplifier type: HIFI amplifierMaterial: IronInterface Type: ClipReceive method: Audio cable Bluetooth USB SD radioChannel: 2.0 channelWhether to support APP: not supportedPlug Type: EU/US/AU/UKWeight: 0.8KGPacking list: 1*Power Amplifier1*Manual 1*Remote Control (Not included the battery)1*Radio Antenna1* Power CordNote:1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need.2. Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm)3.There are no instructions included in this kit.If you want to know how to use or install it,please contact us by Email.We will provide help as much as possible.