ITU‐T's Technical Reports and Specifications 627 need to be designed and constructed as a separate project and in many cases may prove not to be feasible, for example, on the top of a mountain or a hill. 8.5 Bluetooth Bluetooth wireless technology is a short‐range radio technology that uses radio frequency fields to transmit signals over short distances between telephones, computers and other devices. The technology offers simplified communication and synchronization between devices without the need for cables. An illustration of these connections is provided in Figure 21. Source: Adapted from EMF Explained, available at http://www.emfexplained.info/?Page=25530 Figure 21 – Illustration of Bluetooth connections