... within 30s ~ 30m11.Support insufficient disk space alarm function, GPS overspeed/ low speed alarm, G-sensor alarm, motion detection ... alarm12.RS232, RJ45.ODM expansion design; Support GPS, G-sensor, Gyro-sensor module13.Support 3G transmission: WCDMA, ... ,TD-CDMA; support built-in WiFi,(GPRS, EDGE customizing).GPS ,G-sensorbuilt-in G-sensor, support external GPSvideo storageSD ...