Qualcomm has made its Gimbal sensors or "proximity beacons" commercially available as part of the company's context aware platform, which lets, for example, retailers see when a customer has entered a store. A mobile app can be enabled to look for the beacon's transmission. When it's within physical proximity to the beacon and detects it, the app can notify the user of location-relevant content, promotions, and offers, according to Qualcomm.