Can copy existing remote control. channel remote control system allows you to control doors, barriers, home and garage doors How to operate: 1. Clear the historical code of the replicator Press buttons A and B continuously until the LED flashes 3 times Release button B (keep pressing button A), then slowly press button B 3 times, the LED flashes Release the button "A" to complete the code clearing. 2. Copy the code of the sender Place the copier next to the sender and as close as possible. Press and hold button A of the transmitter, and then press button A of the replicator, see the LED of the replicator flashing Release the two buttons to complete the code copy, and copy the other buttons in the same way. Model can be copied as follow: hsm2 868 ,hsm4 868, hs1 868,hs2 868,hs4 868, hse2 868, hsz1 868,hsz2 868, hsp4 868,hsp4-c 868, hsd2-A 868,hsd2-c 868 868mhz blue button Digital D302 868 Digital D304 868 Digital D313 868 Digital D321 868 Digital D323 868 131 868 BERNER BHS140 BERNER BHS110 BERNER BHS121 BERNER BHS211 This model isn't compatible with model: HSM4 26.995MHZ, HSM4 30MHZ, HSM4 433, RSM4 433, HMS4 868 BS etc Colour:Black Material:Metal+PVC Size:6 x 6cm Package Contents: 1 x remote control Only the above package content, other products are not included. Note: Light 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.