2 CH AC 30A Time Delay Wireless Switch With RF Remote Control (Model: 0020663) 4 Channels You can use this transmitter

You can use this transmitter and the receiver to remotely control the AC or DC devices by the normally open contact of another device

Channel 4 is useless

1) Method 1:

1× 1/4" electric solenoid valve

2 CH AC 30A Time Delay Wireless Switch With RF Remote Control (Model: 0020663) 4 Channels You can use this transmitterApplication: This remote control switch or receiver is an time delay electric device with 2 channels dry relay output, it and wireless transmitter form a receiver transmitter system. This system may be used in all types of industry automation, agriculture, home, factory, house, farm, vehicle, ship, offshore operations, etc. It can remote control equipment on land, water and air, such as remote control of lights, sirens, locks, motors, fans, winches,