Countdown Timer Question

Hey guys,

For my landing page for a product I'm going to be selling to people, I plan to have a Countdown timer to invoke a feeling of "urgency" to the user, the fact that this is limited, and that you might not be getting it ever again if not now. Does anyone know how to install this? One that actually counts down and looks real legit? I plan to implement one on my landing page.

Thank you!!

Well for smaller eCommerce sites using woo you can use
[h=1]WooCommerce Sales Countdown [/h]

Here is a plugin that does that: https://wordpress.org/plugins/easy-timer/