It uses ultra-wideband technology to make very accurate ranging measurements with the anchors (=beacons). With this, and together with IMU data, the position is estimated very accurately.
Measured or estimated?
Which?
The kickstarter website makes vague, unsupported claims of 10 cm accuracy in estimated positions.
It appears that the starter kit will cost around US $500.
DWM1000 itself will give around 10 cm under right conditions. Adding IMU will on a good day improve performance to around 2 cm depending on the signal quality. There is a problem though with readings that are slightly off before reaching thermal equilibrium (due to DWM1000 self heating), but with that in mind it is not much of a problem.
We use this Arduino Nano clone with DWM1000 combined with odometry and LIDAR to navigate robots at an art gallery:
In future art projects its little brother will also come to good use:
