Connectivity of the C21 two-way radio is based on a public 4G network and thus assures a stable and secure exchange of spoken information between users. Thanks to a non-slip design, a push-to-talk function and an emergency button, it is user friendly to operate. Thanks to longer battery life it can also be used reliably out of doors. The flexible attach clip avoids unpleasant pressure on the body of the wearer. An LED assures good visibility in case of emergency.