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 Only the items listed above are included. Note: Due to light reflection and differences in display screens, the color of the item in the image may vary slightly from the actual product. Measurement may vary by +/- 1-3 cm.