Feature:1. 16 Channel Relay Board: This relay module features a 16 channel design, which can simultaneously control multiple signals and improve work efficiency. Suitable for simple ON OFF switch electrical equipment.2. USB Control: This relay module adopts USB control, which is simple and convenient, and does not require additional power supply. We can help you build projects such as robots and home automation.3. SPDT Relay and LED: Adopting single pole double throw relay design, stable and reliable, suitable for various application scenarios. Equipped with LED power indicator, it is more convenient to use.4. Optoelectronic Isolator: This 16 channel relay module has built in optoelectronic isolator to ensure stable and reliable signal transfer, effectively reduce interference, and improve transmissing efficiency.5. Secure and Practical: With fine processing, this 16 channel relay board is secure and lasting, and will not malfunction after long term use. It is suitable for automation control, comm equipment, and other fields.Specification:Item Type: 16 Channel Relay ModuleMaximum Load: 10A 250VPower Supply: DC 7-38VMaterial: PCB.Package List:1 x Relay Module