The long battery life has particularly surprised me. Despite extensive "Wireless telegraphy" and refrigerating devices have well persevered 2 full days and nights before she had in the charging station. Prima is also that normal batteries for emergency use can also be used. The special design of the battery pack can not be inadvertently loading the devices with standard batteries. A great safety feature.
With regard to the range of 10 kilometers should be clear that this can only be achieved with the best conditions in the open field. Once bigger mountains between the two devices are no reception is understandably possible. But the range is quite as good to very good estimate.
We are absolutely satisfied with the set. Thus only is from the long-term test.