hengjiumande: Renowned for quality, our offers in automation technology, ensuring that this timer switch operates with high efficiency and accuracy, ideal for managing time-sensitive tasks in agricultural settings. Model Number A3--20PCS: This timer switch is designed with a robust plastic material ensuring durability and reliability in various farm animal applications, suitable for continuous usage in demanding environments. Battery Requirement: Note that this model does not include a battery, allowing you more flexibility in choosing a compatible power source that best fits the operational demands of your farm environment. Chemical Safety: Free from high-concern chemicals, this timer switch is safe for use in environments with farm animals, ensuring that their health and the ecosystem remain protected., Manufacturer: Akfldms