remote control receiver board is suitable for electrical control circuits such as anti-theft alarm, remote control electric door and window, signal control, industrial control, lifting equipment. Remote control switch module relay contact independent output, very suitable for direct control of various types of load; products use fixed code wireless coding technology, no directional, switch does not interfere with each other. 12V remote control switch, the power supply is recommended to use more than 500mA DC regulated power supply. Working mode: self-locking, interlocking, jogging. One control/multiple control can be realized.It is a learning code wireless remote control switch, whose output / working way can be changed as you like, and it is easy to match the transmitter. It has small volume, stable and reliable performance and high receive sensitivity. Solenoids are basically electromagnets: they are made of a big coil of copper wire with an armature (a slug of metal) in the middle. When the coil is energized, the slug is pulled into the center of the coil. This makes the solenoid able to pull from one end. This solenoid in particular is nice and strong, and has a slug with a slanted cut and a good mounting bracket. It's basically an electronic lock, designed for a basic cabinet or safe or door