Japan formally handed over an air surveillance radar system to the Philippines on Wednesday, the first export of a complete defense product since its long-held arms trade ban was eased in 2014.

The system, which can detect approaching fighter jets and missiles, will help bolster the country’s defense amid China’s growing aggressiveness in the South China Sea, according to Philippine Defense Secretary Gilberto Teodoro.

Wednesday’s handover of the first of the four radar systems is based on Japan’s defense equipment and technology transfer deal with the Philippines in 2020. Japan had agreed to deliver four radars.

“These (radar systems) are important because we will be able to see intrusions in our air space from as far as 300 nautical miles,” Teodoro said at a ceremony held at a former U.S. military base, adding that the Philippines can now “get a clearer picture” of any intrusions “not just in the West Philippine Sea but also in other parts” of the country.