On December 29, Turkish defense officials announced the completion of a deal with Russia to acquire the S-400 air and missile defense system. Turkish news media reported that Turkey would purchase one battery of four S-400 units at a cost of $2.5 billion. The Turkish Defense Industries Undersecretariat stated that Turkey maintains the option of purchasing a second S-400 battery. The delivery of the first battery is scheduled for the first quarter of 2020. The S-400 Triumf (NATO: SA-21 Growler) has a range of 250-400 km and is capable of engaging aircraft, UAVs, cruise missiles, and ballistic missiles in their terminal phase.