Kano's Cybernetic Heart
Kano is a man with no supernatural abilities but with his connections to the Underground Black Market, he is able to get his hands on Advanced Cybernetic Technology. He has used his connections for profit but also to constantly upgrade his cybernetics. Such as the Cybernetic "Heart" he wears on a Bandolier across his chest. This device serves as a Power Supply for all his Cybernetic Enhancements and when activated it boost his power and strength.
In Mortal Kombat X, Kano's Heart alongside the rest of his cybernetics changes the color of their lights depending on what variation has been chosen. With Cybernetic giving them the signature red glow, Commando making them glow yellow, Cutthroat having then glow blue and when going variation-less has them glow green.
In Mortal Kombat 11 Kano's Cybernetic Heart is a customized Gear Item and he has a wide variety to choose from. The "Heart" features new abilities such as the: Bio-magnetic Pull, which pulls the opponent towards Kano setting up for a follow up attack. If Amplified, he can fire his "Optic Blast" for extra damage. Another featured ability is the Bio-Magnetic Trap, which Kano takes the Heart from his chest and throws it on the ground (various distances) and if stepped in, the opponent is unable to jump. This ability can be coupled with other abilities such as "Molotov Cocktail", "Chemical Burn" and "Knife Toss" for added damage.
Hsu Hao's Cybernetic Heart Unit
Although unlike Kano, Hsu Hao's "Heart" is an entirely different device. Unlike Kano's external Cybernetic Heart, Hsu Hao's is an actual pulsating Cybernetic Implant grafted into his body replacing his actual biological Heart. He greatly relies on this implant in kombat, as it greatly enhances his strength, stamina and agility, alongside giving him some seemingly supernatural abilities as well. Such as delivering a powerful clap with his hands that generates a very strong gust of wind. As stated earlier the cybernetic implant also greatly boosts his overall power, giving him the ability to jump at inhuman heights to stomp on his opponent or be given enough inhuman endurance to go after Kenshi all night.
Similarly to Kano's Bionic Eye, Hsu Hao's Cybernetic Heart Unit also has the ability to fire a powerful laser, which he uses in his Krystal Laser special move to hurt his opponent or outright kill them like in his Chest Laser fatality.
Hsu Hao continues to use the Implant in the New Timeline as shown in the Mortal Kombat X Comic Book series, however it was pierced and destroyed by Scorpion's Kunai, before Hsu Hao himself was killed.