... 100M 3G3GExternal 3G (Support Huawei E220, etc)I/O Port30pinUSB switch interface*1,Headphone *1, MIC*1 JACK*1, TF card ... stereo loud speakerBuilt-in microphoneMedia FileAudio file formats supported: MP2, MP3, WAV, AAC, WMAVideo file formats supported:720p video playing, MPEG1 ... /2/4; MJPG; H263; H264Photo file formats support:JPG, JPEG, BMP, and PNG.CameraBuilt-in 0 ...