4-pack Wireless Intercom System for Home & Office

Wireless Intercom System for Home & Office. White color. 5300 Feet Range Real Time Two Way Communication Group Call Full Duplex (4 Pack) 3 of the devices are NIB. 1 device is in great preused condition- however, is missing the USB to Micro USB cable & brick charger. Can easily connect to any Micro USB cable. Easy to set up Compatible with Smartphone Features mute option