Features:1. Contact capacity 10A 250 V with optocoupler protection.2. The on-board power module does not require an external power supply.3. The port controller I / O is active low.4. Can be used as MCU development board module, appliance control, extended output, etc.5. With excellent industry optocoupler isolation anti-interference performance and stability.6. Each common relay is independent and easy to use to access different signals, with port normally closed/open and an action indicator.7. User-friendly interface design, all interfaces can be drawn directly through the wiring terminal, very convenient.Specification:Supply voltage: 5VDrive voltage: 5VContact capacity: 10A 250VPackage weight: Approx. 209g/7.4ozPackage List:1 x 16 Channel Relay ModuleNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..