Features: brand new and high quality This RF Remote Controller features forward-reverse-stop capability. You can rotate the motor in positive or reversal direction by transmitter from any place within a reliable distance, wireless signal pass through walls, floors and doors. It is suitable for the motors of projection screen, electric curtains, electric pylons, garage doors, retractable doors, etc. You can rotate the motor in the positive or reversal direction with the transmitter (remote control) from any place within 100 meters. The remote relay adopts RF technology, with long remote control distance and stable signal. The receiving module provides high signal sensitivity at lower cost and resist interference for excellent stability. Specifications: Material:ABS Size:Approx.10x6cm/3.94x2.36in Net Weight:138g Package Includes: 1 x Receiver 1 x Transmitter note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.