... multi -functional charger with speaker, with multiple chargingport for Pad; Pad2; Phone3G; 4G/4S console.Use of digital audio amplifier, 2.0 ... 3.5mm audio input interface, support for other external audio device(such as MP3, MP4, etc.)Four functional electronic switch (audio on ... the video.With 1pc USB interface, can connect USB cable for charging all kinds ofdevices, such as: iPhone; iPod; MP3; MP4 ...