iPhone dongles can do everything from high-speed data transfers to testing for HIV.

At Computex 2015 in Taipei this week, a local manufacturer is showing off a laser pointer for the Apple phone that can precisely measure short distances.

The iPin Laser Ruler is a thumbnail-sized dongle that fits in the iPhone’s audio jack. It houses a class 2 laser pointer that shines a dot of a light on a nearby object, such as a wall or piece of furniture. An app on the phone uses the camera to focus on the dot to determine the distance.

To read this article in full or to leave a comment, please click here