Usage Tips: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 don't interference other remotes and receivers. 5) selector: With 8 dip switches user can make different combination for different remote . Power Input Selector: This receiver can work at 9V~30V. However, it's better to change the PIS according to the power input. If the input is great than 24V, shorten pin 2&3; shorten 1&2 if input less than 24V. Color: white + black Material: ABS Programming a remote 1) Select the correct for remote to be programmed by moving dip switches UP or DOWN. For example 433,92Mhz remote controls, just move Dip-switch 7 UP. 2) the learn button. The LED turn on. 3) the button on the remote, the LED flashes 4 times. It means that remote control was programmed successfully. 4) Repeat for another button. 5)The 2-nd channel programming procedure is the same. Erase all data from the memory card: and hold either learn button. The LED start flash. Keep this button pressed, until the LED turn off. All saved data in the memory card be erased permanently and can not be recovered Compatible : 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.