Oct 13, 2021 · The Bluetooth synchronized solar road stud, which is also called Bluetooth solar co-frequency road stud, refers to the solar road studs installed separated which flash in the same frequency. NOKIN solar road studs NK-RS-A6-1,NK-RS-K1, NK-RS-X5,NK-RS-X6, NK-RS-A10 models all can be adjusted to the Bluetooth synchronized solar road studs.