There are various areas of expertise that EM has developed over the last 10 years and integrates into its modules. The first of which is low power design, both in the integrated circuits, and in the modules themselves. Low power is important during the active mode, of course, but many beacons spend most of their time asleep, so extremely low sleep currents are important to developing a system that can operate on a single battery for as much as 10 years. Like most beacons, EM’s can be powered at 3V, but they are also able to operate in a step-up mode from a single one and a half volt battery. That ability to operate from a single coin cell battery keeps cost down, keeps down the mass of the beacon, and allows the use of environmentally friendly battery chemistries that make the units more appropriately disposable at the end of their life. EM also provides a flexible interface for connecting to accelerometers, temperature sensors, gyros, and other sensors, and they have the ability to connect to these devices simultaneously. EM has excellent RF range given the power consumption, and the over-the-air configurability that, as discussed, increases the devices’ longevity because it allows for feature and security updates.