Note: All of these receivers must have a gateway to work with the Tuya App/Smart Life App. 4 Channel Relay (Three Working Modes) Use for 1.Remotely give a pulse signal to turn on/off Lights,Lamps and other home appliance. 2.Remotely give a pulse signal to turn on/off Garage Door,Door Access 3.Remotely give a pulse signal to control DC Motor,AC Motor to Forward and Reverse The switch is a micro/self-locking smart switchsupporting ZigBee It can be used as a router to help transmit signals to ensure a stable connection when using multiple devices in your house. What can I use it for? *Connect a light, remotely control the switch of the light.Connect a light, remotely control the switch of the light, and can also switch on and off regularly 19:00 On 21:00 Off *Open your curtains regularly 7:00 *Change the water for the fish tank regularly *Use mobile phone or voice control Garage door switch *Control your heater remotely *And your coffee machine *Connect a water pump, remote control or timer switch More functions waiting for you to discover. DIY Feacture Two Input Ports You could choose USB 5V port or the screw terminal port to supply power in the input to make the pcb board board work. Dry Contact/Passive Output No matter how many power you supply in the input, the output don't have any voltage (Except that the input and output share the same power supply) If you do not supply power in output port, the connectted home appliance can't work, you also need to supply power in output. Timer The connectted home appliances can be automatically turned on/off according to the time schedule. Each channel can set different time schedule. Function APP Remote Control Require Tuya Hub. You can check the working state of the device in Tuya APP anywhere and anytime. RF433mhz Control The device can be controlled by the RF433mhz Remote Controller. Mobile Phone Control Require Tuya Hub ,when you go outside or at home, your smart phone could control the device by 2.4Ghz WIFI or 2G/3G/4G Mobile Network. Voice Control Require Tuya Hub, you could voice control the device by Alexa/Google Assistant. Parameters: lnput voltage: DC/AC 7-32V , AC 85-250V,Micro USB 5V input Max.Current:2200W/10A wireless Standard:Zigbee Working temperature: -20~70 Size: 69*41*20mm Checklist before using the device You need to have a gateway. Try to be close to the gateway when pairing. Remote Control Control your home curtains anytime,anywhere Smart Scene Creating your own scene to trigger ON/OFF home appliances by departure mode, home mode, temperature, humidity, or other environmental conditions. Family Sharing Share the control with family member.Enjoy the convenience and happiness together Smart Scene Creating your own scene to trigger ON/OFF home appliances by departure mode, home mode, temperature, humidity, or other environmental conditions.