The PC-157WR is only 1 inch in diameter by less than 3.5 inches long but they offer great features and top performance. Their machined metal cases will impress you with their quality and ruggedness. Resolution is a sharp 380 lines for both security cameras. Stepless automatic electronic shutters handle very dim room light or bright outdoor applications with ease. All camera control functions are automatic, ensuring great video in nearly any situation. These weatherproof cameras are not designed for total immersion, but are extremely rugged to survive humid or outdoor environments. Plug and play video and power cables are standard, as is a swivel mounting bracket. Power requirements is 12 volts DC and draws under 100 mA. Comes with easy connection instructions, pre-installed plug and play video cables, swivel mounting bracket, 1 year warranty and a 30 day money-back satisfaction guarantee.