Tuner Section FM Stereo Frequency Area US, Europe 18FM 12AM Presets with 30 station memory. Bluetooth:Stable BT chip. RMS Power Output:4 x 50W. Power supply:DC 12V. 2.8 Clear LCD Display. All In One Crisp Knob. Input Types:Bluetooth, USB(up to 64GB), AUX. Outputs:1 pair RCA Pre-Amp Out, One Way Input. Support RCA subwoofer audio output. Ideal for:Car, motorcycles, yacht, fishing boats, cuddy cabins, ski boats, the unit is also perfect for spa pools, quad bikes, golf carts, UTV, ATV and RV. Easy to see and use under the sun or in the darkness.