We are Shenzhen Welldone Technology and Industry Co., Ltd, a leading manufacturer of wireless doorphones and wireless access control systems in China. The wireless doorphones and wireless access control systems of our company have the functions of wireless doorbell, wireless talking and remotely opening door. Communication distance can up to 100-300 meters in clear area. They are update substitutes for the traditional doorbells. They make your life and works much more convenience and safe and pleasure. Product Features: 1. INTERCOM: Talks between Base (Mainframe) and Handsets can be done simultaneously. Let you can know who is the calling in person before you opening door. It makes your life or work safer. 2. WIRELESS: Intercom distance is up to 100-300 meters in free area. Let you can answer the calling beside desk, in boardroom, on the sofa of living room, or even on the bed. It makes your work or life more convenient. 3. EASY INSTALLATION: Wires spreading indoor is not necessary. It will not break up your indoor ornaments. 4. MULTI-HANDSETS: A Base (Mainframe) can be used with four Handsets and talking to Base (Mainframe) can be transferred between handsets. 5. REMOTELY OPEN GATE: Connect an electron lock in your gate with the Base or Lock Controller you can open the electron lock remotely with a Handset. No need you go to the gate once and again. 6. LONG RANGE: Intercom range is longer than commonly used wireless doorbell or wireless video doorphone. It gives you more free space. 7. CHEAPER: Prices are much cheaper then wireless video doorphones. They have more potential markets and are suitable for more families and offices using. The wireless doorphones and wireless audio access control systems of our company are patent products in China and have got CE certificate. Our products have exported to Europe and Africa. We are willing to make faithful cooperation and establish long-term business relationship with international trade companies, wholesaler, importer, or distributor.