Tested and working. Does not come with power supply. Experience stunning visuals with the Acer R221q offer 21.5-inch IPS Full HD Display. This monitor boasts a maximum resolution of 1920 x 1080 and a response time of 4 ms for clear and smooth images. The widescreen and 16:9 aspect ratio enhance the viewing experience, making it perfect for gaming, streaming, or work. With VGA, DVI, and HDMI ports, it is versatile and compatible with most devices. It's a great choice for anyone in need of a reliable and high-quality monitor.