Microsoft is turning to robots to provide security for its Silicon Valley campus, according to a new report.

The software giant as become one of the first companies to use an autonomous robot security guard — called K5 — to keep ne’er-do-wells from causing trouble on the campus, according to ExtremeTech.

K5 is about the size of a human, and weighs in at 300 pounds. It is equipped with cameras, sensors, and alarms, along with some sophisticated artificial intelligence. This allows Microsoft to replace some human security patrols.

K5 is meant to alert security to intruders or other unwanted visitors, and does not carry any weaponry of any kind.

California company Knightscope built the robot, which is described as an “autonomous data machine” that commands authority yet also provides “a friendly physical presence.”

Inside the five-foot-tall container on wheels is four high-definition cameras facing in all directions, a camera that can scan license plates, four microphones, blaring alarms, weather sensors, and even WiFi connectivity that allows robots to contact headquarters if it encounters a situation. Its artificial intelligence is meant to allow it to distinguish between a benign gathering nearby and someone attempting to enter through a window.

If K5 is alerted to something, it may respond by using its sirens to diffuse things, or it can summon a human from headquarters. K5 will warn you if you try to interfere with it — gently, at first, and then with an “ear-piercing alarm,” according to the report.

K5 also aims to help people who are in trouble. It has a button on top of the robot that will allow an individual to summon help.

The K5 has a battery that allows it to run for a full 24 hours. As its battery runs low, it automatically heads to the charging point, where it spends a mere 15-20 minutes getting fully juiced.

Primarily, the move is a money-saving effort as the robot will be much cheaper to maintain and operate than employing full-time security guards.

The technology may improve to the point where K5 can spot smaller discrepancies that a human would normally overlook. Its low cost also means you can deploy lots of robots at once, making it more difficult for intruders to slip past them.

Robot guards are a new concept, but it’s not the first time it’s been tried. In 2012, a prison in South Korea began a field trial of the first robotic prison guards, which conduct autonomous patrols of prison halls to keep watch on what’s going on without having to have a full-time human guard do the work.