design: 433.92 MHz RF wireless remote control switch. Stable and performance with high reception sensitivity ( - 97 dBm). Strong signal can pass through walls, floors, doors. It can be controlled within 50 metres without obstacles. You can remotely control any machine connected to the relay receiver via the remote control. Easy to use: extremely easy to set up and reset. It is a programmable remote control kit. There are 3 operating modes (momentary / toggle / latched mode), which can be . You can set up yourself depending on your needs. The operating mode of the product is adjustable. These products are tested dispatch and programmed in Toggle mode. [More flexibility]This receiver contains 4 10A relays and there are 3 ports (closer, , opener) for each relay. These 4 relays are , so you can remotely control each of independently. This is a potential-free contact relay. Passive output Dry contacts Each receiver can about 20 transmitters. transmitter can also control multiple receivers. Quality Assurance: High quality relay that can be used over 100,000 . Let this product use more durable 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. 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. size:12.1 x 7.8 x 5.2cm Material: ABS colour: As shown Package Contents: 1 x RF relay receiver 2 x remote controls (including batteries) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.