Features: Multi channel control: This product provides 8 or 16 channel networks relays control switches, which can remotely control the switching status of multiple devices or circuits simultaneously. Internet management: supports internet management functions, allowing users to remotely monitor and control devices through the internet, facilitating flexible management and operation. W5100 networks module: The product adopts the W5100 networks module, which has high-speed and stable networks connection, ensuring the reliability and efficiency of data transmission. P2P WIFI router support: Supports P2P WIFI router modes, which enables direct communication between devices without the need for external servers, improving communication speed and security. 2A Internet of Things Module: Equipped with a built-in 2A Internet of Things module, it can quickly connect to the Internet of Things platform and achieve interconnection with other intelligent devices. Widely used: home improvement, hotel, mall management, daily office work, store monitoring, networks, industrial control equipment, industrial control equipment, power control, unmanned, intelligent management of ship, engine rooms, centralized management, etc. Specifications: Material: Printed Circuit Board Type: 8-Channel, 16-Channel(optional) 8 Channel: External Power Supply Voltage: DC5V 2A Number of Relays That Can Be Connected: 8pcs Electronic Switches Life: 100,000 Times Working Temperature: -30°C~85°C 16 Channel: External Power Supply Voltage: up to DC5.5V 2A Number of Relays That Can Be Connected: 16pcs Electronic Switches Life: 100,000 Times Working Temperature: -30℃~85℃ Package Includes: 1 Piece 8/16 Channel Networks Relays Control Switching Module note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.