|Broadcast area||Basque Country and Navarre|
|Headquarters||Bilbao, Basque Country|
|Picture format||1080i HDTV|
(downscaled to 576i for the SD feed)
|Sister channels||ETB 2|
|Launched||31 December 1982(testing) |
16 February 1983 (official)
|Digital||Álava: Channel 45|
Biscay: Channel 35
French Basque Country: Channel 33
Gipuzkoa: Channel 48
Navarre: Channel 26
The channel broadcasts entirely in Basque.
The channel began test transmissions on 31 December 1982 and officially launched on 16 February 1983 as ETB, using this name until the launch of its sister ETB 2 on 31 May 1986, at which point ETB was renamed to ETB 1. A HD feed of ETB 1 was launched on 21 December 2016.
Its programming includes: interviews, films, documentaries, sports, youth and children's programmes, making a strong emphasis on sports and children's programming.