Philips docking entertainment system DC315 dock for iPhone/iPod

Sound output power (RMS): 2x4W
•Tuner bands: FM
•Station Presets: 20
•Antenna: FM Antenna
•Auto digital tuning: Yes
•iPhone Compatibility: iPhone, iPhone 3G
•iPod Compatibility: iPod Touch, iPod Touch 2G, iPod Classic, iPod Nano
1G/2G/3G/4G, iPod 5G
•Alarms: 24 hour alarm reset, Dual alarm time, Buzzer Alarm, Radio Alarm, Repeat alarm (snooze), Sleep timer

Bass Reflex Speaker System delivers a powerful, deeper bass

Bass Reflex Speaker System delivers a deep bass experience from a compact loudspeaker box system. It differs from a conventional loudspeaker box system in the addition of a bass pipe that is acoustically aligned to the woofer to optimize the low frequency roll-off of the system. The result is deeper controlled bass and lower distortion. The system works by resonating the air mass in the bass pipe to vibrate like a conventional woofer. Combined with the response of the woofer, the system extends the overall low frequency sounds to create a whole new dimension of deep bass.

8W RMS total output power

This system has 8W RMS total output power. RMS refers to Root Mean Square which is a typical measurement of audio power, or rather, the electrical power transferred from an audio amplifier to a loudspeaker, which is measured in watts. The amount of electrical power delivered to the loudspeaker and its sensitivity determines the sound power that is generated. The higher the wattage, the better the sound power emitted by the speaker.