Compatibility Our replacement garage door opener is compatible for handheld transmitter HS1-868, HS2-868, HS4-868, HSM2-868, HSM4-868, HSE2-868, HSZ1-868, HSZ2-868, HSP4-868, HSP4-C-868, HSP4-C-868, HSP4-C-868, HSP4-C-868, HSD2-A-8 68, HSD2-C-868, HSD2-C-868 NOT COMPATIBLE Our replacement garage door remote control is only compatible with the for 868.3MHz blue buttons, it is not compatible with other color buttons and for BS series handheld transmitters. 4 CHANNELS: Our wireless handheld transmitters can control up to 4 garage doors. Working voltage: 12v Working current: less than equal 27mA Transmitting distance: 100 meters (open space) Colour:Gray Material:Plastic Package Contents: 3x remote control garage door 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.