1, HDD+SD Card Storage ( Support 2.5” HDD, max 128G SD Card) protect from Shock & Dust damage;support USB port data backup and deviceupdate. 2, Support 2 USB interfaces, data backup and device upgrade. 3, Support 9CH alarm input (1CH Analog + 8CH IO Alarm input ), 2CH independent alarm output. 4,Through 3G/4G real-time monitoring, plus WiFi module can automatically download data. 5, Support Broadcast/Intercom/Text sent etc;can add oil sensor/temperature sensor/POS/LED Advertisement Panel. 6, Support IOS/Android Phone Remote monitor ,High level aviation interface,easily installation and better shockproof, more stable.