Features： 1、Widely used in the design and development of home and industrial electronic products for the majority of electronics enthusiasts, can be used as a signal input source for single chip microcomputers 2、Particularly suitable for the electronic circuit design of students in colleges and universities, can be connected with a single chip, or add a first level amplifier to drive a relay or a small DC motor 3、Module board set three selections of self locking, interlocking, triggering (inching), high level, low level, machinery and equipment, automation equipment modification, PLC industrial control, robots and other intelligent products 4、There is a signal light for each channel to clearly know which switch is working. There are three options of self locking, interlocking, triggering (inching) for working mode 5、Double panel designed PCB, 2 independent design, no interference. The interface design is humanized, equipped with wiring terminals, which can be directly connected to the lead 6、Adopts single chip design, possess stable and reliable performance, strong anti interference, no false trigger with superior performance 7、The trigger terminal has optocoupler isolation, and the trigger power supply can be independent of an external power supply, which is truly completely isolated 8、Come with 2 tact switches as product test, directly check the stability of the product. There are power indicator(green LED) and 2 switch instructions(red LED) 9、Use a relay to control the load, the load can withstand 250V 10A (AC) and 30V 10A (DC) Specification： Item Type: Relay Module Quiescent Current: 12MA/13MA/13MA Working Current 1 Way: 100MA/65MA/48MA Working Current 2 Way: 190MA/110MA/65MA Module Size: Approx. 63.5 x 38.5 x 18.5mm / 2.5 x 1.5 x 0.7in Designed With 4 Bolt Holes: Spacing: Approx. 58 x 33mm / 2.3 x 1.3in, Diameter: Approx. 3mm / 0.1in Package List： 1 x Relay Module