Samsung SMT-1933 LED Monitor Nairobi Samsung SMT-1933 LED Monitor Nairobi The Samsung SMT-1933 LED Monitor Nairobi features a 4:3 aspect ratio varied screen and supports up to 1280 x 1024 resolution, providing superior HD image quality Digital Natural Image engine. The SMT-1933 is designed specifically for use in qualified security systems it owns a dynamic contrast ratio of 1000:1, with a 5ms response time.