Sub-1 GHz gives you kilometers of range with very low power consumption. The RF bands are license-free and the robust co-existence technology solves the increasing problem of interference from other wireless systems. Sub-1GHz is suited for applications running on small batteries: Metering and smart grid, alarm and security and home automation.
While the market requires better power performance, it also continuously demands more functionality from devices. The challenge many developers face today is maintaining or improving battery operating life while simultaneously increasing a device’s capabilities. For many devices, it is not feasible to increase battery size or capacity. Developers need to achieve higher performance within the same power footprint if battery life is not to be compromised.