... SD Card slots optional,VOIPl Built-in wireless module like 3G (EVDO, WCDMA,HSPA, HSDPA, TD-SCDMA…), GPRS…optional.l ... axis3G,WIFI Wireless transmissionBuilt-in wireless module optional. Such as 3G EVDO, HSPA, HSDPA, WCDMA…GPRS, EDGEPlaybackSystemVideo SearchSearch video via ... of, x 2,x4,x8,x16.StorageSD CardSupport 2 SD Cards, 32GB for each(default 1 card supported).PowerPower Management1,Vehicle ...