This is the 6080th most frequent Russian word.
специального
"Special" or "of special."
Here, "специального" modifies "назначения" to indicate a specific or specialized purpose of the equipment.
Для этого проекта требуется оборудование специального назначения.
This project requires equipment of special purpose.
In this case, "специального" describes "устройства", showing that the device is specifically designed for a certain function.
Мы провели тестирование специального устройства для измерения температуры.
We conducted testing of a special device for measuring temperature.
The term "специального" is used here to lengthen the noun "подарок", suggesting that the gift was chosen for a unique or significant occasion.