ChunHee Intercoms Wireless for Home- 16 Channels 1.5 Miles Intercom System for Home Use with VOX Hands-Free, Two Way Communication Intercom System, LCD Back-lit Display Screen

The package arrived on time and in good condition. The radios are small and compact with crisp and clear audio. The rechargeable lithium ion battery holds the charge very well. I use them for communication between the upstairs and downstairs of my home, which has a solid concrete flooring, and also concrete walls. The distance of communication is approximately 60 feet with no problems. I have not tested these radios over longer distances, but it serves our purpose well, especially when phone and Internet services were down for two days. I consider having these radios to be essential, especially during emergencies and will recommend as such.