Specifications: 1) Distance: 50-150 meters 2) Mini size: 5.5cm x 4.5cm x 1.0cm 3) One receiver can work with 400 codes 4) No interference with other remotes and receivers 5) Selector: With 8 dip switches to create different combinations for different remotes Power Input Selector: This receiver can operate at AC/DC 9V~30V. It is recommended to adjust the PIS according to the power input. If the input voltage is greater than 24V, short pin 2; if input is less than 24V, short pins 1 and 2 Color: White + Black Material: ABS Programming a new remote: 1) Select the brand for the remote to be programmed by moving dip switches UP or DOWN. For example, for 433.92MHz 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, indicating the remote control has been programmed successfully 4) Repeat for another button 5) The 2nd channel programming procedure is the same Erase all data from memory: Press and hold the learn button. The LED will flash. Keep the button pressed until the LED turns off. All saved data in the memory will be erased permanently and cannot be recovered Compatible with: All 433.92MHz fixed code remotes Package Contents: 1 x Receiver 3 x Remote Control Only the above package content, other items are not included Note: Light reflection and different displays may cause the color of the item to appear slightly different from the actual product. Measurement allowance is +/- 1-3cm