Features:  One add-on mini audio box for all Camera which need audio function. High sensitive microphone and DC12V power regulator built-in box.  Technical Specifications:  • AUDIO OUTPUT: Max 2 V p-p • POWER SUPPLY: 12 VDC (+ / - 0.5V) • POWER CONSUMPTION: 10 mA • DIMENSIONS W x H x D mm.: 40 x14.5x8 (Audio Box) • Weight g.: 100 • STORAGE TEMPERATURE: –30°C to +60°C • OPERATING TEMPERATURE: –10°C to +45°C