Feature:1. [8 CHANNEL DESIGN] The relay module is 8 channel design, with less interference and a wide range of applications.2. [EASY TO CONTROL] Can control multiple channels with a single command, can control multiple devices, easy to use.3. [WITH LED INDICATOR] Both the power supply and the relay have LED indicators, and the working status is clear at a glance.4. [COMPACT SIZE] The relay switch module is small and compact, easy to install and does not take up space.5. [WIDE APPLICATIONS] Widely used in remote control systems, smart homes, identification systems, data collection, etc.Specification:Item Type: Relay ModuleProduct Material: PCBProduct Model: N223B08Working Voltage: DC 12VCommunication Protocol: UARTStandby Current: 17mA (all relays closed)Indicator Light: LEDApplicable Scenarios: Remote control, telemetry system, wireless instrument, smart home, home automation, smart home, access control, identification system, data collection, IT home appliances, smart home appliances, baby monitoring systems, etc..Package List:1 x Relay ModuleNote:Please use the correct working voltage.