Motorcycle and Yacht stereo system with a pair of four-inch loudspeakers and a miniature amplifier Built-in FM radio receiver Detachable amplifier with a stereo input jack makes it easy for connection to other audio output devices like portable-CD (Discman), MD, MP3 Power and mute switches Radio or CD input selector Stereo operation capability Easy mounting Suitable for 12V motorcycles, scooters and yachts Specification Maximum power @ 4 Ohms 50W x two RMS power @ 4 Ohms 25 x two THD: <0.1% S/N: >75dB Channel separation: >45dB Frequency response: 20Hz to 20kHz Sensitivity: 50mV FM frequency range: 87.5 to 108MHz FM usable sensitivity: 25 at S/N 30dB