Controls upto 4 devices from remote control.Specification:1, working voltage: DC 12V2, Static current: less than 6mA3, working temperature: -40℃ - +80℃4, the receiving sensitivity is not less than -105dBm5, working frequency: 315MHz6, Remote control distance: in theory, it is 100 meters. but in reality, it is about 15 meter ~ 30 meters.7, Cover size: 60mm * 45mm * 30mm (L * W * H) Board size: 58mm * 43mm 8, Relay Capacity: 10A 250VAC / 10A 30VDC It is 4 channel remote with relay receiver with helps to turn on and off upto 4 devices remotely Three Working mode: Momentary: Press and hold->On; Release->Off (defauft.) Toggle/Self-Lock: Press->On; Press again->Off Inter-Lock: Press->On; Press other button->Off Change The Working Mode & link the remote 1) Momentary working mode (still hold) LED flash one time, release the button.à the LED indicator light up about about 5 seconds(still hold), then LED light off Step 1: Long press the button of receiver (hold) & close the remote and receiver, press any key of the remote, the LED of receiver flash several times, the linking is finished.Step 2: Press the button of receiver again about 2 seconds, the LED light up, release the button. 2) Self-lock working mode (still hold) LED flash two times, release the button.à the LED indicator light up about about 5 seconds(still hold), then LED light off Step 1: Long press the button of receiver (hold) & close the remote and receiver, press any key of the remote, the LED of receiver flash several times, the linking is finished Step 2: Press the button of receiver again about 2 seconds, the LED light up, release the button. 3) Inter-lock working mode (still hold) LED flash three times, release the button.à the LED indicator light up about about 5 seconds(still hold), then LED light off Step 1: Long press the button of receiver (hold) & close the remote and receiver, press any key of the remote, the LED of receiver flash several times, the linking is finished. Step 2: Press the button of receiver again about 2 seconds, the LED light up, release the button. Brand No Brand SKU 100231723_NP-1020489882