Refer to the input text as context and select the correct relationship between 'Asus' and 'smartphone' from the available options.
Options: founded by, subsidiary, product/material produced, chief executive officer

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