The Syncom II was 15 cm high and 28 inches in diameter, weighing 78 Lbs in orbit.

In contrast, the Intelsat IVs weighed more than 1,300Lbs (595 kg) into orbit and were more than 17 feet (5.2 meters) in diameter.

All seven satellites exceeded their projected life expectancies and were withdrawn from active duty, the last of which, the Intelsat IV F-1 was retired in October 1987.

It had 6,000 two-way relay phone calls or broadcast 12 concurrent color television programs or mixed combinations of communications traffic including data and fax.

[3] The satellite was successfully launched into space on January 23, 1972, at 00:12:04 UTC, by means of an Atlas SLV-3D Centaur-D vehicle from the Cape Canaveral Air Force Station in Florida, United States.