Use the Fraser Optics External Power Cord for extended surveillance and observation sessions with your S250 Stedi-Eye image-stabilized binocular. It plugs into a standard 12 VDC car/vehicle power port, drawing power from the vehicle and eliminating the need to worry about having to change the binocular's onboard battery. With a coiled length of 42 inches that can stretch to as much as 132 inches, this is the ideal solution for search and rescue operations on the water or in aircraft and extended surveillance from cars or trucks.