Mercury 2-way Intercom System Energy Saving Telephone Style Wall Mounted

2-Way intercoma two station, energy saving, telephone style intercom with a simple two wire connection, allowing 2-way conversation. It features a call button with adjustable call tone level. Both units are powered by 4x aa batteries not supplied .Detailspower supply 6vdc 4 x aa per unit sensitivity

2-Way intercoma two station, energy saving, telephone style intercom with a simple two wire connection, allowing 2-way conversation. It features a call button with adjustable