Solar Wireless Intercom Doorbell for Long-Distance Communication Through Walls and Non-Visual Intercom System Advanced Solar Technology: Powered by solar energy, this wireless intercom doorbell ensures uninterrupted operation without the need for frequent battery replacements. Long-Distance Communication: Designed to facilitate clear and reliable communication over long distances, perfect for large homes or buildings. Wall-Penetrating Capability: This doorbell system can effectively communicate through walls, ensuring that you never miss a visitor, regardless of your location within the premises. Non-Visual Intercom: Enhances security by allowing voice communication without the need to reveal your visual identity. Easy Installation: No complex wiring required, making the setup process quick and hassle-free. Colour:White Material:plastic Package Contents: 1 set x Solar Wireless Intercom Doorbell Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.