This model starts with the jet black of underground darkness, which is accented by orange and yellow colors that are often used in caving suit designs. The hour markers and bezel markings are embedded with luminescent material for easy reading in the dark. This same material is used for the luminescent center stripe of the PRG-650YL model’s leather band, which makes it highly visible even under the illumination from a headlight. The stainless steel band ring has an ion-plated (IP) finish that matches the black image of this watch and also provides a higher level of durability.
Advanced functions include Triple Sensor (bearing, altitude/barometric pressure, temperature), hand shift, and more.