HOSMART Wireless Intercom System Two Way Communication Home and Office,with Crystal Clear Sound, 1000 feet Range(Incompatible

1. Completely hands-free and easy to use. 2. Clear voice quality for high-quality communication. 3. Incredible long-range communication. 4. Easy to connect to other intercoms, allowing you to expand to multi-intercom systems. Expandable for up to 6 units. 5. Multiple power sources allow even for outdoor use with the DC 5V power bank (the power bank is not included). 6. New technology with special anti-interference features to help solve interference problems. 7:Making a call in 3 methods. NOTICE: 1. Different intercom units should be set different code numbers. 2. In general, there is no need to set the channel. : If you distribute one channel to multiple units, it may cause a system failure. 3. This intercom system is expandable for up to 6 units in one system. We do not recommend connecting more than 10 units to a single system. 4. This version is not compatible with any previous intercoms. 5. Need to be plugged in to use.