The satellites have Ka and Q band transponders, and provide high speed internet, telephony, and other services. They were manufactured by ISS Reshetnev, and are based on the Ekspress-2000 bus featuring two deployable solar arrays with five panels on each. The design life is 15 years.
The first satellite Kosmos 2520/Blagovest-11L was launched on 16 August 2017, Kosmos 2526/Blagovest 12L on 18 April 2018, Kosmos 2533/Blagovest 13L on 21 December 2018, with the fourth (Kosmos 2539/Blagovest-14L) launched on 5 August 2019, using a Proton-M carrier rocket with Briz-M orbital insertion module. All launches took place from the Baikonur Cosmodrome Site 81 Pad 24.
|Satellite||Launched on||Carrier rocket / Orbital insertion module||COSPAR||Position||Status|
|Blagovest 1||16 August 2017||Proton-M / Briz-M||2017-046A||46° est||OK|
|Blagovest 2||18 April 2018||Proton-M / Briz-M||2018-037A||49° est||OK|
|Blagovest 3||21 December 2018||Proton-M / Briz-M||2018-107A||52° est||OK|
|Blagovest 4||5 August 2019||Proton-M / Briz-M||2019-048A||55° est||OK|