Features pressurized ink that lets you write upside down, under water, over glossy surfaces, in extreme temperatures, and for 3.5 miles. Victorinox knife/letter opener, screwdriver, nail file, and scissors. Swiss Cross logo activates a flashlight. Uses a CR1025 battery, included, for over 12 hours of continuous use. Smooth twist action for opening and closing. Durable pocket clip & balanced weight. Stainless steel makes the pen impervious, even to salt water.