Annapolis, Maryland-based Zephyr Technology, a wearable remote monitoring company, has raised $2.4 million from undisclosed investors, according to an SEC filing. Former investors include 3M New Ventures, Alsop Louie Partners and Motorola Solutions Venture Capital.

Zephyr products include the BioHarness 3, which a user wears around his or her chest to monitor heart rate, breathing rate, ECG, posture and more. Additionally, Zephyr carries health care specific devices, such as the BioPatch and ZephyrLife, the software that supports BioPatch. In late 2010, FDA granted Zephyr 510(k) clearance for the BioHarness.

Over the past few years Zephyr has used their products in a variety of applications that monitor fitness levels, vital signs and substance abuse. Popularity in recent months is due to Zephyr's appearance on CNN when the network's Chief Medical Correspondent Sanjay Gupta worked out while wearing the BioHarness.

In late 2012, Massachusetts General Hospital conducted a clinical trial to monitor women giving birth while wearing the harness. The results of the trial will determine how quickly MGH's Center for Global Health could move it to Uganda where the technology would help physicians know who is in most dire need of help during pregnancy.

Most recently, researchers at Baylor have started a pilot to combat drug abuse with Zephyr technology. The harness monitors the heart rates of addicts to verify that the addict stays clean.

The company is also known for its part in the rescue of the Chilean miners after the 2010 collapse as well as the introduction of Zephyr's E39 health sensing shirts into professional football.