SensorTag is designed to let developers test out their Bluetooth Low Energy sensor ideas in minutes. The development kit is easy to set up and use, and demonstrates how easy it is to get started with Bluetooth Smart accessories. The SensorTag kit includes a SensorTag with eight MEMS sensors running from a coin cell battery and an app that can be used on Bluetooth smart enabled devices. The kit also includes complete smartphone app source code, that can be used to make Bluetooth Low Energy enabled apps just as easy as making other smartphone apps. Shown here is an illustration of how the SensorTag can be used to demonstrate an appcessory idea. A smartwatch prototype can be designed in 30 minutes by using the LCD display DevPack, combining it with the built–in 9-axis motion sensor and the ability to control everything from a smartphone app. Another example, iBeacon, is supported right out of the box or, an alarm system consisting of several SensorTags as door and window alarm sensors can be prototyped on the phone app or connected to a cloud service and can be demonstrated in less than one hour.