[Large design] Wireless remote control switch RF 433MHz. Stable and reliable performance with high reception sensitivity (& GT; 97DBM). Radioifrequency signal transmission. You can remotely use each connected machine to the relay receiver via the transmitter. A strong signal can cross walls, floors, doors, etc. It can be checked less than 30 meters away. The chip code is the EV1527 learning code which makes the system more secure. [Easy to use]: extremely easy to configure and reset. There are 3 operating modes (momentary/rocking/lockable mode) that can be chosen. You can easily configure yourself according to your needs. The mode product operation is adjustable. This element has already been configured in rocking mode . Whether it is a DC motor or an alternating current engine, you can easily use this product for the remote control. [More flexibility] This receiver contains 2 relays, and there are 3 terminals (normally open, common, normally closed) for each relay. These 2 relays are independent, so you can remote control independently by pressing on The remote control button. Each receiver can store around 20 transmitters. And a transmitter can also control several receivers (the transmitter must correspond to the receiver). [Quality insurance] A high quality relay that can be used more than 100,000 times, making this product more sustainable and more stable to use. This receiver adopts a 10A relay, which can load high power electrical devices. The high power terminal can support a current of 15A. This receiver is suitable for the voltage DC 6V ~ 30V, so the two DC12V and DC24V are OK. It is more flexible to use. [Large application] Products can be used in houses, farms, factories, offices, laboratories, supermarkets, etc. You can remotely use each device connected to the relay receiver via the remote control. such that, garage door, electric door, shutter door, expansion door and electric curtain, fan, lamp, lighting, ventilation device, signal transmission and so on.