Dota 2 Wiki

The Scan button is located on the right of the minimap.

Scan and Glyph icons are split up for spectators, showing both teams' cooldowns.

Players can use the Scan ability on the right of the minimap UI to detect any enemy heroes in an area.


Scan icon.png
Scans a targeted 900 AoE for 8 seconds. Indicates whether there are enemy heroes in that area during the 8 seconds.
Cast Range: Global
Radius: 900
Scan Interval: 1
Ping Sound Interval: 2
Duration: 8
Cooldown: 210
Modifiers [?]


  • Alt+Keyboard White Mouse Left.png Left Click informs the team of its cooldown state.
  • Alt+Ctrl+Keyboard White Mouse Left.png Left Click advises the team to not use it yet.
  • Checks for enemy presence in 1 second intervals, starting immediately on use, resulting in 9 checks.
  • Does not show how many heroes there are, just if there are any enemy heroes.
  • Does not give vision or reveal anything other than the presence of enemy heroes.
  • Enemies do not know when your team casts it.
  • Has a global team-wide cooldown of 3.5 minutes.
  • Starts on cooldown (not available at the beginning of the match).
  • The button is located at the bottom right corner of the minimap border, above the Glyph of Fortification button.

Cooldown Manipulation[]

There is currently one source of Scan cooldown reduction.

The cooldown reduction is granted by the aura, not the item itself. This means using Scan while no one is affected by the aura (i.e. item owner is invulnerable and has no allies nearby), the cooldown is not reduced. Causes the Scan's cooldown to skip the first 105 seconds upon cast.

Scan cooldown gets reduced even when the player who activated it is not affected by the aura, as long as another ally is affected. This means a second Telescope icon.png Telescope does not reduce the cooldown any further.

Scan Cooldown Reduction Sources
  • Telescope icon.png
    Radius: 1200
    Scan Cooldown Reduction: 50%
    Aura Linger Duration: 0.5
    Aura, affects all nearby allies. Multiple instances of Prescient Aura do not stack.

Version History[]

Radius: 1200
Scan cooldown reduction: 50%
  • No longer ignores heroes inside Roshan icon.png Roshan's pit.
  • Reduced cooldown from 270 to 210.
  • Created.

Patch History[]

  • Scan can now be Alt+Keyboard White Mouse Right.png Right Click to inform team of its cooldown state.
    • Ctrl+Keyboard White Mouse Right.png Right Click advises the team to not use it yet.
  • Announcer now has response rules for usage of Scan.
  • Response rules have been added for the right and wrong usage of Scan.
  • Added spectating view for Scan.
  • Adjusted the blue color for Scan in color blind mode.
  • Scan now supports color blind mode.