Once thrown the Proximity Alarm will indicate it's effective radius and must fill the radius in order to be activated. The gadget will emit an alarm once an enemy enters its 3 meter radius, alerting Defenders to their general location. The Proximity Alarm activates nearly as soon as the effective radius is reached, taking a short delay to activate. The alarm the device makes is a beeping noise that can be heard by both Attackers and Defenders. A HUD icon will appear on Attackers who enter the Proximity Alarm's radius. The Proximity Alarm's beeping can be heard a great distance away, even through surfaces.
- The gadget's existence was first leaked in April 2018 but was not officially announced until the Six Invitational 2020.
- A 3D printed model of the gadget was made by the artist who designed it.