RTB1 it was officially launched the regular television set services opened by 29th Sultan of Brunei Darussalam's Kebawah Duli Yang Maha Mulia Sultan Haji Hassanal Bolkiah Mu'izzaddin Waddaulah on 1 March 1975 with full coverage in the Brunei-Muara District.
•
On 1 March 1976, 2-high power medium wave stations in the Brunei-Muara District commenced transmission, expanding the coverage of radio and television services to almost 100% of the country.