Radio Tower

"Set your communication options."

- In-game description

Radio Tower
The Radio Tower sends you an e-mail alert if your base is attacked, allowing you to quickly come back in time to repair and/or fight back, see who attacked you, and/or prevent more attacks. You may only get 3 e-mail notifications  attackers each day. You may also choose get news and update notifications. Since the construction period is less than five minutes, you can just skip this using the (free) "speed up" button without losing gold. After that, players can turn it on/off.

Upgrade Progression
Can build one only, only LV 1 can be built