External card type ultrasonic flowmeter HNF00-A

1: Ultrasonic flowmeter built-in advanced measurement chip
2: Built-in magnet unique design, automatic snap together, with no stripped screws one-handed 60S easy installation
3: four-line OLED display date/signal/instantaneous/accumulative amount at a glance low light/dark environment easy reading
4: Innovative menu selection (drop-down list) four touch buttons for easy setup (no need to memorize menu numbers)