New Arrival Intercom Home Interphone Audio Doorbell. FEATURES: Two Way Intercom, One Way Call and Lock Function Two Wire Connection With a New ABS Plastic, Durable Excellent Consumer Side of the Tone Circuit, Intercom Voice Clarity Effective Distance of 200 Meters Above Intercom Easy Installation Easy Use Complete Door Phone System D-I-Y Assembly For One Family 2 Wires Connection Surface Mounting Version Electricity-controlled Unlock Function. SPECIFICATIONS: Audio Distortion Rate of 50mW Talk Time: Unlimited, Free Calls Input Voltage: AC220V 50Hz, Output Voltage: AC12V 1200mA Frequency Response: 300 ~ 3400HZ Working Voltage: DC12V Power Consumption: Static <0.2W, Call Status <2W . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.