Specifications: Model: BT-298A Input voltage: AC 220V/ DC12V(in car) Plug: EU plug bluetooth: Support Output power: 80W+80W Peak power: 300W+300W Channel: 2 CH Load impedance: 4-16Ω SNR: >92 db FM frequency: 87.5-108MHz Distoration rate: 0.05% Frequency: 10Hz-20KHz Sensitivity: 0.25mV-220mV RC power supply: CR2052 battery(built-in) Size: Approx. 18×15.5×5.5cm/ 7.08×6.10×2.17” Features: -Mini HIFI digital bluetooth audio power amplifier. -Built-in LCD display, with backlight function. -SD Card, U disk, MP3 format play, support bluetooth wireless connection. -Supports FM stereo radio. -Two microphone input slot, karaoke system in your home or in car. -With treble, bass, and volume control, very easy to use. -Low distortion supplies a clearer, stronger and more powerful sound.