Sunba Outdoor Aluminum CCTV Microphones for IP Cameras with RCA Interface and a Warning Decal to present at Entrance Inclusive RCA Outputs: Audio In/Out Free Switch for IP Cameras with Female/Male RCA Audio Ports Power Required: DC 12V, 0.02A (DC Splitter Cable Included) Monitor Range up to 540 Square Feet; Sensitivity: -4.0dB~+3.0dB (0dB=1V/Pa, 1KHz); Automatic Gain Control: 40db with Maxim 9814 Chip 3mm Screws Required (not included); Working Temperature (Celsius): -40 ¨C 85 degrees for Intensive Weather Condition. What's Included Waterproof Microphone, User Guide, 1 to 2 Y-Shape DC Power Splitter Cable, Warning Decal Complimentary Warning Decal The warning decal must be used together with the microphone and posted at the entrance of monitoring (read user guide for detailed guideline).