wp_is_mobile()

Function: Test if the current browser runs on a mobile device (smart phone, tablet, etc.)

Source: wp-includes/vars.php:127

wp_is_mobile

Filter Hook: Filters whether the request should be treated as coming from a mobile device or not.

Source: wp-includes/vars.php:149

Filter Hook: Filters whether Google Chrome Frame should be used, if available.

Source: wp-includes/vars.php:68