AC220V input for the receiver. Press the Set button on the receiver; the LED indicator flashes. Then press the button on the transmitter; the LED indicator turns off, indicating successful learning. When you press the down stop button, you will hear the sound of the relay. This controller is suitable for tubular motors. This controller does not include a limit switch terminal. Designed for tubular motors with limit switches. Input voltage: AC220V. Frequency: 433 MHz. Material: plastic. Color: white. Package includes: 1 x receiver, 1 x transmitter (with battery). Only the above items are included; other products are not included. Note: Lighting and different displays may cause slight color differences between the image and the actual item. Measurement error allowance is +/- 1-3 cm.