An affordable DIY Intercom system

• Push On / Off power button on master unit
• PTT communication circuit
• Clear and loud “Ding Dong” door chime sound
• Wall Mounted or Desktop
• 2 units per set
• 20m (66ft) connection cable is included
• Low power consumption
• Power source: DC 6V adaptor or 4pcs of C batteries on master unit only (batteries excluded)