Several attempts with other products (including ME), who did not keep all of what they promised; short range, dropouts, full batteries were considered empty and push buttons, which were destroyed during the first pressing. Then saw at Amazon displaying Grothe Mistral 300; 1. Surprise unit arrived the next day! Then .. visual inspection, it was quality, no brittle thin plastic, solid connections, many techn. Options and settings, everything really well thought out and easy to install. After functional control over a few days and ideally button as well as the reception - on several floors; loudly (adjustable) without interference or dropouts, plus batteries last about 1 year, some sizes (selectable) 4-5 years, only the ringtones could still be improved, but is not essential. Overall, I am extremely satisfied with the purchase and would recommend the device to all, the no trouble with such a system have mnöchten.
