Digital two way radio systems, such as the Motorola DP1400 & Hytera PD405 handhelds offer a number of advantages over traditional analogue systems.
One important feature is privacy & security, as digital systems cannot be eavesdropped like analogue systems can.
This is true for business walkie talkies as well as mobiles & base station radios.
Handheld Digital radio equipment also has greater battery life, compared with the equivalent analogue handheld.