PHP multiple checkboxes in Woocommerce product page

I'm trying to make multiple checkboxes in the Woocommerce product page. Managed to make one with 1 checkbox. I need 4 checkboxes though... I'd appreciate it very much if you could point me in the right direction!

woocommerce_wp_checkbox( array( 
'id'            => '_checkbox', 
'wrapper_class' => 'show_if_simple', 
'label'         => __('My Checkbox Field', 'woocommerce' ), 
'description'   => __( 'Check me!', 'woocommerce' ) 
)