3G mini DVS support GPS, SMS , alert, DVR WCDMA/HSPA smart design smallest 3G DVS in the world ... ,one headphone output,support central intercom.6Video disposalH264 coding ,support D1+CIF,support 0.1M-4Mpbs stream adjustable,support 1-25 ... frames/second frame rate,Photo JPG encoding support D1.7Audio disposalAAC compression,AAC decoding,support two-way intercom function ...