With its modern, wire free design, the ERA Wireless Door Intercom couldn't be easier to use. It is battery powered which makes for a straightforward installation and the handset is lightweight for user convenience. The rechargeable handset holds a battery time of approximately 10 hours, while the outdoor station has a battery life of approximately 1 year (based on 2x daily use). Additionally, the 200 metre range means it is suitable even for very large properties.