Meet the StickEar: a smart sensor that transforms sounds into visual notifications. It can detect knocks, doorbells, smoke alarms, and baby cries. It notifies you through Lumies, which happen to be wireless light modules. The device has an omnidirectional microphone, a 3-axis accelerometer, and a capacitive touch button. It lets you know when it is running low on battery.
The device has a range of 50 meters indoors and supports up to 20 Lumies. You don’t need a WiFi connection to get started. The rechargeable battery lasts up to 16 hours (standby time). More information is available on Indiegogo.