Nov 19, 2021 · Bluetooth Solar Road Marker Light With 30 Tons Compressive NOKIN Bluetooth synchronized solar road stud NK-RS-A6-1 specification: LED Color is Red,Yellow,White,Blue,Green 5 colors for you to choose. Solar road stud Working model is Synchronized flashing (2Hz). Working hours is 55hours after fully charged. Installation distance is 3-4M.