SA-T04H H.264 video recording hd dvr for cctv security systemFeatures SUPPORT: 4CH 720P AHD Camera, or 2ch ... 10M/100M Adaptive Ethernet portProtocolsTCP,DNS,DDNS,FTP,SMTP,3G,PPPOE,EMAIL,P2PFunctionSupport web browser, CMS, monitoring, ... playbackMobile monitoringSupport iPhone&AndroidSATASATA×1 ≤2TBPTZ control1 RS485, support multiple PTZ protocolsUSBUSB2.0×2Authority managementSupport add, modify, ...