=========== The Leica DISTOT plus is the only device in the world that offers the highest accuracy, attractive design and wireless data transfer by means of BLUETOOTH® in one package. Even if you are currently still working with paper and pencil, integrated BLUETOOTH® technology allows you to make the change at any time and to record your values electronically. The data can be transferred on site wireless to a PDA (Pocket PC) or directly to a laptop and easily used for other purposes.
Range of measurement: 0.2 up to 200 m (0.7 up to 650ft). Accuracy: ±1.5mm (0.06in) ===========
What is the theory behind laser ranging?
Thanks.