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 models: 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 above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement allows an error of +/- 1-3 cm.