1. Privacy is strong 2. One to one key copy 3. Each key password alone save 4. Can continuous repetitive copy use times 5. Easy to install and durable, rolling code. Compatible Models: for HSM2 868 ,HSM4 868 for HS1 868,HS2 868,HS4 868 for HSE2 868 for HSZ1 868,HSZ2 868 for HSP4 868,HSP4-c 868 for HSD2-A 868,HSD2-c 868 It is only compatible with for 868MHz blue button Working voltage:12V Working current:less than equal 27mA Launch distance:100 meters (open space) How to operate: Same as the old remote control, needs to be paired with the host For:Such as electric telescopic door remote control, road gate remote control, alarm remote control and so on. Wireless transmission distance: 10-150 (m)(open space) Colour:Black-Gray and Blue Material:ABS Package Contents: 1 x Garage Door 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.