• Type: apartment intercom
• Dial: DTMF
• Output sensitivity: 60mV
• Intercom working current: 100mA
• Power Voltage: AC, 220V 
• Color: White, Black and maroon
• Frequency response: 3dB, 300Hz - 3400Hz
• Handsfree phone: Yes
• Louder Ring Sound: Yes
• Wall Mountable: Yes
• Common Key Phone: Yes
• Origin: China