DZRH (666 kHz AM) is a commercial news/talk radio station serving Mega Manila market, which serves as the flagship radio station of the Manila Broadcasting Company in the Philippines. The station's studio is located at CCP Complex in Pasay City, Philippines, while its transmitter is located at Brgy. Malanday, Valenzuela City. DZRH is the oldest radio station in the Philippines and it is a member of the Kapisanan ng mga Brodkaster ng Pilipinas or KBP. It broadcasts nationwide through an array of relay stations, each with its own frequency, re-broadcasting the national feed from satellite. DZRH can also be heard on the internet, with various interactive features; a live chatroom where listeners can feed comments to the station in real-time, two modes of VOIP that can be used to call the station and participate in open-line discussions, and an online discussion forum called "Damdaming Bayan Online". It also has a cable television channel known as DZRH News Television, wherein some of the programs heard on the station as well as some shows produced by the channel can also be seen on selected cable and satellite TV affiliates nationwide. Though it is one of the oldest radio stations in the Philippines,[citation needed] DZRH was not the first. The first radio station in the Philippines was the now defunct KZKZ, which began broadcasting from Manila in 1922.