Specifications: 1) Distance: 50-150 meters. 2) Very mini size: 5.5cm x 4.5cm x 1.0cm. 3) One receiver can work with 400 codes. 4) It does not interfere with other remotes and receivers. 5) Selector: With 8 dip switches, users can make different combinations for different remote brands. Power Input Selector: This receiver can work at AC/DC 9V~30V. However, it's better to change the PIS according to the power input. If the input is greater than 24V, short pin 2; short 1&2 if input is less than 24V. Color: white + black Material: ABS Programming a remote: 1) Select the correct brand for the remote to be programmed by moving dip switches UP or DOWN. For example, for 433.92MHz Marantec remote controls, move Dip-switch 7 UP. 2) Press the learn button. The LED will turn on. 3) Press the button on the remote; the LED flashes 4 times. This indicates the remote control was programmed successfully. 4) Repeat step 2 for another button. 5) The 2nd channel programming procedure is the same. Erase all data from the memory: Press and hold the learn button. The LED will start flashing. Keep the button pressed until the LED turns off. All saved data in the memory will be erased permanently and cannot be recovered. Compatible brands: All 433.92MHz fixed code remotes. Package Contents: 1 x Receiver 3 x Remote Control