Aug 04, 2022 · 08 04 2022. Solar Motorway Road Stud With Shank For Highway-NOKIN Solar 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.