They using ET Slider. Why not you use Firebug to check their code.
Code:
<div class="wrapper-after" style="width: 1903px;">
<div class="img-bird-wrapper et-in-viewport-check et-in-viewport-floating_special" et-anim-easing="ease" et-anim-delay="0" et-anim-duration="3500" et-anim="floating_special" style="animation: 3500ms ease 0s normal forwards 1 running floating_special;">
<img src="http://www.enginethemes.com/wp-content/themes/et_home_new/img/bird-code-min.png">
<div class="tooltip-item tooltip-item-1" data-header-text="pos-item-1"></div>
<div class="tooltip-item tooltip-item-2" data-header-text="pos-item-2"></div>
<div class="tooltip-item tooltip-item-3" data-header-text="pos-item-3"></div>
<div class="tooltip-item tooltip-item-4" data-header-text="pos-item-4"></div>
</div>
<div class="shadown-bird et-in-viewport-check et-in-viewport-pulse_special" et-anim-easing="ease" et-anim-delay="0" et-anim-duration="3500" et-anim="pulse_special" style="animation: 3500ms ease 0s normal forwards 1 running pulse_special;"></div>
