Electrochromic polymer has many advantages over other similar technologies. Firstly, our technology achieves superior consumer performance in terms of both color and contrast and state switching speed. Secondly, at the request of the client, any color of tinting can be realized. Thirdly, the ability to flexibly change the lower and upper limits of light transmission within a single delta of contrast change. Consumption 0.3 W per sq.m. while maintaining color no more than 1.5 W per sq. m. during the painting procedure is absolutely safe and energy efficient.