2 AAA batteries (includes monitor batteries).Electronic sound notification of measurement completion.Record the weight with the measurement value hold function.Convenient TARE button switch Hooks are stored on the back of the main unit.Perfect for night fishing! !!Backlight function included.LCD liquid crystal display adopted.Maximum measurement weight: 50kg.Unit of measure Kg (kilogram) / metric system lb (pound) / imperial system g (gram) / metric system oz (ounce) / imperial system.Automatic power off function.