It\\\\\\\'s our pleasure to introduce our products to you.Our products are not only have multi-functions such as monitor,unlock,mutual calling,ring choosing,picture saving etc.but also easy to operate and installion.We can offer you resonable price and perfect service,also you will have a special quantity discount if you place regular oders or in large quantity.The following you can find the specifications of our products. Inter-Phone Color Power Supply : AC 100-250v Camera Tube: 4\\\\\\\" LCD Resolution: 480 x 234 L Ring type: \\\\\\\"Ding dong\\\\\\\" Power Consumption: Standby: 130mW Working:14w Size: 220 x 195 x 50mm Currency: USD Unit Price: Quantity: Delivery: for futhure nagociation