Excellent design: 433.92 MHz wireless remote control switch. Stable and reliable performance with high reception sensitivity ( - 97 dBm). Strong signal can pass through walls, floors, doors. It can be controlled within 50 metres away without obstacles. You can remotely control any machine connected to the relay receiver via the remote control. [More flexibility]This receiver contains 4 10A relays and there are 3 ports (closer, together, opener) for each relay. These 4 relays are , so you can remotely control each of them independently. This is a potential-free contact relay. Passive output Dry contacts Each receiver can store about 20 transmitters. And one transmitter can also control multiple receivers. Quality Assurance: High quality relay that can be used over 100,000 times. Let this product use more and stable. The high-performance terminal can withstand a current of 10 A, so that this product can have a good effect even in unstable current. The receiver is suitable for 95 V ~ 250 V voltage, it is more flexible to use. Suitable for 220V 230V 240V 110V. Easy to use: extremely easy to set up and It is a programmable remote control kit. There are 3 operating modes (momentary / toggle / latched mode), which can be . You can easily set up yourself depending on your needs. The operating mode of the product is adjustable. These products are tested before dispatch and programmed in Toggle mode. Wide application: products can be used in private homes, farms, factories, offices, laboratories, supermarkets, etc. You can remotely control any device connected to the relay receiver via the remote control. such as garage door, electric gate, roller gate, extension door and electric curtain, motor, lamp, lighting, ventilation device, signal transmission and so on., Manufacturer: Jnchdghwa