Analyze the relationship between 'Asus' and 'smartphone' within the context of the input sentence.
Options: subsidiary, chief executive officer, founded by, product/material produced

In order to woo this fast-growing mobile phone-cum-camera wielding audience, the Taiwanese device maker Asus has debuted its latest device, the ZenFone 2 Laser, which promises to have the best smartphone action camera.
product/material produced