This item features a 7 " TFT color LCD moniter screen, including one outdoor camera and one indoor monitor, which combines functions of two-way intercom, unlock, real-time surveillance, waterproof and night vision. Quality PMMA and ABS material also ensures durable use. With rain-proof shell for outdoor use, and IR leds for good night vision, it is widely used in villas, apartments, houses, hotels, offices, public buildings and so on.