BLUETOOTH wireless technology is a short-range wireless technology that enables wireless data communication. You do not need to use a cable for connection such is the case with USB, nor is it necessary for the devices to face one another, such is the case with infrared technology. For example, you can use such a device in a bag or pocket.

BLUETOOTH standard is an international standard supported by thousands of companies all over the world, and employed by various companies worldwide.

What is "pairing"?

Pairing registers the sensor with your Android or iOS device, and allows the sensor to connect and communicate with the app wirelessly via BLUETOOTH.