ANP581 Digital Display Gauge is a smart high-accuracy survey gauge. It features real-time display, and long-term stability. WithWith five-digit LCD display, it's easy to operate and install. It has low voltage alarm, data units converting, backlight and automatic zero clearing function. The The housing and connection material is 304 stainless steel with the good performance of vibration resistant. It requires 3 AA battery or USB supply. It is suitable for portable pressure measurement, automatic equipment sets and pressure vessels