Features: One-button bistable Relays module, the welding position of the external suction indicator light is reserved. Adopts printed circuit board designs , -control, stable and reliable performances, strong Not -interferences. Large Power Voltages regulatorprovides sufficient and stable Voltages and have sufficient heat dissipation holes to ensure the long-terms stable and reliable operation of the product. Equipped withgood Seats and leading wire, more convenient to use. Use the Relays to control the load, the load under AC250V 10A and DC30V 10A can be endured. Specifications: Material: Printed Circuit Board Size: Approx. 52x37x26mm/2.05x1.46x1.02inch Power Supply Voltages: 12V Package Includes: 1xBistable Relays Module note: Please allow 0-1cm error due to manual measurement, make sure you do not mind before you order. Please allow for slight color differences due to different Monitors Resolution.