Hello,

Please go to file js/main.js and find these lines:

/*------------------------------ Flexslider Init ------------------------ */ 
function flexsliderInit(){
	"use strict";
	$('.flexslider').each(function(){ 
		var $s = $(this);
		$s.flexslider({
			slideshowSpeed: 6000,
			animationSpeed: 800,

Edit the value of slideshowSpeed: 6000, to your wish. The more you increase, the more it will slow down.

Best regards!

Hello,

Do you mean remove them? If so, add this code into your custom css box:

#content .wpb_gallery_slides ul.flex-direction-nav {
    display: none;
}

Best regards!

Hello,

Please add this code too:

.flexslider {
    border: none !important;
    box-shadow: none !important;
}

Best regards!