Designed specifically for hand-held transmitters, this remote is only compatible with 40.685 MHz grey button models. It is not suitable for other BS series (BiSecur) colored buttons and remote controls, ensuring precise compatibility and functionality. Ideal replacement for garage remote controls: fully compatible with for handheld transmitter models HSE2-40, HSE4-40, HS2-40, HS4-40, HSM2-40, and HSM4-40. This remote seamlessly replaces lost or damaged units without the need for complicated programming. Enhance your access with a 4-channel wireless hand-held transmitter capable of operating up to 4 garage and outdoor door operators. This feature-rich remote offers expanded control, allowing you to manage multiple access points with a single device. Compact and portable design makes this remote a perfect addition to your keyring. Its mini size ensures it is easy to carry and does not add bulk. This remote offers convenience and ease of use, making it an ideal choice for everyday use.