While this requirement was doable for outdoor applications, it made it impossible to use these devices for other applications because of interference from obstacles. The main advantage of using analog video transmitters which still holds true today is for Real Time video transmission; if you want delay free video for a manufacturing process then they are still the equipment of choice. The recent advancements in cmos camera sensor technology have allowed great reductions in pricing for megapixel IP cameras, thus enabling the average consumer to afford high definition video. At the same time, prices for wireless access points have become affordable and WiFi radio technology has become more reliable. Gone are the days of access points over heating, and intermittent data streaming because of issues with poor RandD from the factory. As of 2015, it is affordable to combine a IP camera with a access point and make the camera wireless. You can use any ip based network camera and use either a 2. 4GHz or 5. 8GHz WiFi access point such one of the following:WiFi signals just like your home router have better penetration through obstructions without loss of video signal. That's why you can have your router on the ground floor and still watch Youtube on the second floor. Of course, the stronger the transmitter inside the router or AP, the farther it can transmit the signal.