The phrase "also includes a pair" is correct and usable in written English.
You can use it when you want to specify that something is part of a larger group or collection, and you want to highlight that a pair is included.
Example: "The gift basket also includes a pair of handmade candles."
Alternatives: "also contains a pair" or "also features a pair".
The Tracks line also includes a pair of $180 headphones called Ultra that are geared toward audiophiles.
Along with the country-flavored material, the album also includes a pair of songs that Costello wrote for the Royal Danish Opera as part of an unfinished project about Hans Christian Anderson.
The founding group also includes a pair of wireless executives: Steve Hooper, former chief executive of McCaw Cellular Communications, and Kathy Iskra, the former chief financial officer of Nextlink Communications Inc.
The mah-jongg set also includes a pair of dice, a quantity of tokens or chips used for scorekeeping, and a rack used to keep the tiles upright and to keep their faces hidden from other players.
This section also includes a pair of glove-like black leather shoes belonging to the philosopher Immanuel Kant, who famously defined the Enlightenment as "Humankind's release from self-imposed tutelage".
Google's cardboard also includes a pair of plastic lenses so it can create an Oculus-style wraparound effect of the stuff you're looking at on your phone.
It will also include a pair of controllers to bring both of your hands into VR.
Turned toward the center of the camp, the copper face also included a pair of burning eyes from which a steady stream of burning fuel fell.
The forces of good also include a pair of bland teenage agents who look like cousins of Mad magazine's "Spy vs. Spy" comic strip characters.
The participants also include a pair of former ambassadors to the Soviet Union, two former ambassadors to Israel, two former ambassadors to Pakistan and a former director of the CIA.
A chronicle of rock en espanol's early, punk-inspired years, with an emphasis on the Mexican pioneers of the movement but also including a pair of key cuts by Los Fabulosos Cadillacs.
