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) No interference with other remotes and receivers. 5) Selector: With 8 dip switches to make different combinations for different remotes. Power Input Selector: This receiver can work at AC/DC 9V~30V. 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 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 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 will be erased permanently. Compatible with: All 433.92MHz fixed code remotes. Package Contents: 1 x Receiver 3 x Remote Control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3cm.