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 remotes. 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, shorten pin 2; shorten pins 1 & 2 if input is less than 24V. Color: white + black Material: ABS Programming a new remote: 1) Select the correct code type 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 was programmed successfully. 4) Repeat for another button. 5) The second channel programming procedure is the same. Erase all data from 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 memory will be erased permanently and cannot be recovered. Compatibility: All 433.92MHz fixed code remotes. Package Contents: 1 x Receiver 3 x Remote Control Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement allowance is +/- 1-3cm.