... , PAL or NTSC, BNC interface,1.0Vp-p,impedance 75OhmsVideo compressionH.264 Main Profile @Level 3 ... video, PAL or NTSC; BNC, level: 1.0Vp-p, impedance: 75Ω,Audio Compression G.726, G711, ... standard. (Max 32G SD card), Support FTP server.Alarm Input 4 channel on/off input, supporting NO (normally ... or NC (normally close) sense.Alarm Output 4 channel on/off output,120VAC 1A/24VDC 1AAlarm MessageSending ...