Product Specifications: This replacement garage door remote operates at a frequency of 26.995 MHz. Please verify compatibility with your existing system before purchase. The remote has a compact design, making it portable and suitable for attaching to keychains or backpacks. Working voltage: 12V Working current: less than or equal to 27mA Compatible with the following models operating at 26.995 MHz: HS1, HS2, HS4 HSE2 HSM2, HSM4 HSP4, HSP4-C HSD2-A, HSD2-C HSZ1, HSZ2 Color: Gray, Black Material: Plastic Package Contents: 2 x Garage door remote control Note: The package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight variations in the color of the item shown in the picture compared to the actual product. Measurement may vary by +/- 1-3 cm.