Specifications: 1) Distance: 50-150 meters.2) Very mini size: 5.5cm x 4.5cm x 1.0cm.3) One receiver can wk with 400 codes.4) It don't interference other remotes receivers.5) Br select: With 8 dip switches user can make different combination f different remote . Input Select: This receiver can wk at AC/DC 9V-30V. However, it's better to change the PIS accding to the input. If the input is great than 24V, shten pin 2and3; shten 1and2 if input less than 24V.Col: white and blackMaterial: ABSProgramming a new remote1) Select the crect br f remote to be programmed by moving dip switches UP DOWN. F example 433,92Mhz Marantec remote controls, just move Dip-switch 7 UP.2) Press the learn button. The will LED turn on.3) Press the button on the remote, the LED flashes 4 times. It means that remote control was programmed successfully.4) Repeat step 2 f another button.5)The 2-nd channel programming procedure is the same.Erase all data from the memy card: Press hold either learn button. The LED will start flash. Keep this button pressed, until the LED will turn off. All saved data in the memy card will be erased permanently can not be recoveredCompatible :All 433.92mhz fixed code remotes.Package Contents:1 x Receiver3 x Remote ControlOnly the above package content, other products are not included.Note: Light reflection different displays may cause the col of the item in the picture a little different from the real thing. The measurement allowed err is 1-3cm.