... ; BNC, level: 1.0Vp-p, impedance: 75Ω,Audio CompressionG.726, G711, ADPCMAudio Input1/2/4 channel, RCA port, liner input, Impedance:1KOhmsAudio Output1channel ... protocol, 2.4GHz, maximum wireless distance can be 100 meters, Supports WEP,WPA,WPA2(support wireless model)Storage interfaceBuilt-in standard SATA port for HDD ...