Digital Amplification

 is a Premium Upgrade for the Monkey Beacon introduced in Bloons Tower Defense 4 that increases the vicinity of the Monkey Beacon's range immensely by digitaly amplifying it. When this premium upgrade is activated, the Monkey Beacon covers nearly the entire screen, similar to the Epic Range Upgrade for the Super Monkey in Bloons Tower Defense 3. With this premium upgrade only two Monkey Beacons are required to cover the entire track. This can be very helpful to the player's towers. It costs 15, or 5 Gold Medals to unlock in Bloons Tower Defense 4 iOS.

Trivia

 * This premium upgrade allows the Monkey Beacon to be the tower that covers the most range in BTD4, apart from the Monkey Temple on its track.
 * In BTD5, this premium upgrade is called Bigger Beacons.