ADVENT Drone (LW2)
ADVENT drones are the first mechanical enemy you'll encounter fielded by ADVENT, likely in your first missions. They can be found accompanying ADVENT soldiers and also roving around ADVENT cities on their own.
The ability to shut down solo drones is a very useful task for a specialist when attempting stealth missions, since a successful hack will *not* break concealment. However, take care when taking control of a drone, as it may spot and activate a pod that was previously outside of XCOM's line of sight.
Combat-wise drones are very weak offensively, having a high chance stun at melee range, or a very inaccurate disorient at range. Defensively they are relatively strong however, with constant defense from flying and armour.
Their hack defense is the weakest of the ADVENT mechanical units, and hacked drones make good distractions, likely absorbing a few shots that would otherwise be aimed at your soldiers.