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 doesn't interfere with other remotes and receivers. 5) Brand selector: With 8 dip switches, user can make different combinations Compatible with different remote brands. Power selector: This receiver can work with 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 circuit pin 2&3; short circuit 1&2 if input is less than 24V. Color: white + black Material: ABS Program a new remote 1) Select the correct brand for the remote to be programmed by moving the dip switches UP or DOWN. For example, Compatible with 433.92MHz remotes, just move dip switch 7 UP. 2) Press the learning button. The LED will turn on. 3) Press the button on the remote, the LED flashes four times. This means the remote has been programmed successfully. 4) Repeat Compatible with another button. 5) The programming procedure Compatible with the second channel is the same. Erase all data from the memory card: Press and hold either learning buttons. The LED will start flashing. Keep holding the button until the LED turns off. All data stored on the memory card will be permanently erased and cannot be recovered. Compatible with: All 433.92MHz fixed code remotes. Package Contents: 1 x Receiver 3 x Remote Control Only the above Compatible with package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.