Intercom doorphone for dual-room communication with a 200m operating distance, enabling convenient and clear two-way conversation. Features a 2-wire connection system that ensures strong signal transmission and reliable performance. Easy to install—suitable for desktop placement or wall mounting; ideal for DIY setup. Energy-efficient design with no power consumption when idle. Practical and versatile, suitable for use in offices, warehouses, homes, and other environments. Specifications: Battery: 1.5V (each unit requires 4 x AA batteries, not included) Bell Ring Volume: 70dB at 0.5 meter distance Connection: Wired via RVV2 cable (cable not included) Dimensions: 22.2 x 8.7 x 7.3cm / 8.7 x 3.4 x 2.9in Color: White Material: ABS Notes: - Must connect units using matching color-coded wires. For distances up to 50 meters, use RVV2x0.5mm cable; for up to 100 meters, use RVV2x1.0mm cable. - Delivery includes 2 units. Package Contents: 2 x Wired Intercom Doorbell Please note: The package includes only the items listed above. Other accessories are not included. Lighting and display differences may cause slight variations in color between the product image and actual item. Measurement allows for a tolerance of +/- 1-3cm.