LED Bails

The bails light up once the wicket is broken, this is what you observed in the T20 games that happened. The bails light up because they have LED are inside them which is very sensitive and responds in 1/1000^th of a second.

A microprocessor is inbuilt in them which is powered by a low voltage batteries which are incorporated in both the stumps and bails. The microprocessor activates right after the bails connection is dislodged.

Spider cam

This camera is that hovers the field around the heads of players capturing in every take of the match.

The camera works in a 3D manner as the strings and axles attached to it at the four corner of its support, helps it to move both vertically and horizontally.

The carrier is gyro stabilized which is connected with Kevlar cable to resist torsion.

Read Also:

10 Internet Myths You Might Fall For, so beware!

Google's Next Android Update To Hit The Devices Next Month?