This product is adopted 1/ 3 SONY CCD and digital signal processor ( DSP ) technique. Plugboard is processed with SMT art design . This style is of reliable quality and excellent image. It has strong capacity to defend the interference magnetism. It' s durable and installed easily. It is your best choice for CCTV system. Installation steps: 1. DC 12V positive pole and video output are in the same wire. Connecting DC 12V positive pole to wire terminal, then connecting the video output to related video input terminal. 2. Connecting DC 12V negative pole and STP separately to related terminal. 3. Fix up the pedestal on the ceiling , fix up the screw of pedestal. 4. Aim at the scope what you want to watch, then fix up the screw of horizontal angle. 5. Choose a good angle to the aim thing first , then fix up the screw of declining angle.