Seco 62 mm Blinking Strobe Prism The Seco 6416-00 Blinking Strobe Prism is designed for surveying in low-light and nighttime conditions, providing enhanced visibility without compromising measurement accuracy. Featuring a 62 mm sealed prism canister with integrated LED strobe , it allows crews to easily locate and target the prism in challenging visibility environments. A built-in red LED flashes every two seconds with a 0.5-second pulse, while all electronics and the battery are securely housed within the canister for durability and weather resistance. The prism features an M20 thread , making it compatible with standard screw-in prism holders, and delivers reliable accuracy for field applications. Key Features • 62 mm prism with integrated LED strobe for low-light visibility • Red LED flashes every 2 seconds (0.5-second pulse) • Sealed canister with built-in electronics and battery • Uses CR-1/3N battery (approx. 48-hour runtime) • M20 thread for standard screw-in prism compatibility • Designed for nighttime and low-visibility surveying • Delivers reliable measurement accuracy (<5")