Transflective TFT displays are characterized by very good readability in bright ambient light and direct sunlight. While transmissive TFT displays can only be operated with a backlight, transflective TFT displays feature a partially transparent reflector in front of the backlight. There, incoming ambient light is reflected and used to illuminate the display. As a result, the readability of the content in very bright ambient light is perfect even without backlight.
LYH 08 Sports Watch using Transflective TFT screen make you seeing the screen in strong sunlight with no difficulty.