Smart Device Features: While not a smart device, this meter offers straightforward, user-friendly interfaces and functions that do not require complex setups or connectivity, ensuring reliability and ease of use. Model YY-400: This advanced model features a digital display with backlight, making it easy to read measurements in any lighting condition. Ideal for monitoring pH, ORP, H2, and temperature in various aquatic environments. : This meter, originating from , meets rigorous standards for performance. Battery Requirements: Please note that batteries are not included with this meter. Users need to purchase batteries separately, allowing for more flexibility in choosing high-quality power sources for longer usage. Certification and Safety: This product does not come with specific certifications but is constructed with non-hazardous materials, ensuring it is safe for use in home or professional settings without compromising on quality., Manufacturer: Akfldms