DH-SD6923-H: 23x optical zoom, 1/4» Super HAD CCD II, 540TVL, IR, IP66: Network Product: Standalone DVR: Special DVR: Compression Card: PTZ Dome Camera: PTZ Dome Camera: Analog Camera: HD-SDI Camera: Software: Accessory: Traffic Surveillance: Video Door Phone: Intelligent Lock: SD6923/6930/6936/6970-H: Home Product PTZ Dome Camera SD6923/6930/6936/6970-H: SD6923/6930/6936/6970-H: 23x/30x/36x/23x All-Weather IR PTZ Dome Camera: Overview: DH-SD6923-H: 23x optical zoom, 1/4» Super HAD CCD II, 540TVL, IR, IP66: Camera: > Effio-S brings low-light and high-resolution images: > Mini. Illumination of 0.001Lux @F1.6(Color), 0.0001Lux @F1.6(B/W): > Powerful 23x: > Day/Night (ICR), DNR (2D&3D), Auto iris, Auto focus, AWB, AGC, BLC: Dome Drive: > Max 240 °/s pan speed, 360° continuous pan rotation & auto flip with no blind spot monitor: > Up to 255 preset, 5 auto scan, 8 tour, 5 pattern: > Auto recognition of general protocols such as DH-SD, Pelco-P/D, and etc: > Speed setup according to the focal distance, auto rotation speed adjust in accordance with the lens zoom rate: > Auto restore to previous PTZ and lens status after power failure: > Time Task: Auto activation of Preset/Scan/Tour/ Pattern by preset-time: > Idle Motion: Call preset/tour and etc operations after idle for the specified time (including the idle status after the system boots up): > OSD and operation prompts of various languages: > Build-in 7/2 channel alarm input/output: > Intelligent 3D positioning function: > IP66 all-environments protection, 4000V thunder-proof: > Easy installation with user-friendly designs: IR Lamp: > The longest distance of the build-in IR lamp is over 100m: