• working voltage: 5V DC
• VCC - power supply positive, GND - power supply negative
• working current: 110mA (relay is closed)
• static working current: 8mA (relay is released)
• module dimensions: 53 x 62 x 22mm, with three fixed bolt hole
• module type: 4 channel 433Mhz RF learning wireless receiver module
• receiver distance: 15-100m (signal can be through walls)
• working mode: support inching control, self lock control and interlock control as you like
• working indication:
    LED D1-D4 light (relay turn on/off indicator light)
    LED D5 light (power indicator light)
    LED D6 light (learning signal indicator light)

Package contains:
1x 4-channel relay module
1x 4-channel 433Mhz remote control

Programming the relay start mode.
Hold down the Sx (Sx - the relay number you want to program) switch before turning on the power, and release Sx after turning on the power and signaling the D6 LED (2 flashing-lock mode or 3 flashing-normal mode).

Programming remote control.
Each channel is programmed individually by pressing the Sx switch, releasing and re-enabling and releasing Sx. Entering to the programming mode is signaled by one flash D6. Then press the button on the remote control. Correct reception of the remote control signal will be triggered by double flashing of D6 LED.

Restore factory settings.
Hold down the Sx switch before turning on the power, keep the power on and hold until D6 LED flashes four times.