... -lightning Low power consrmption 1,304overall flow pipe 9,Header cover(433MHZ aneennas or infrared optoelectronic interfaces)2,Ultrasonic ... 10,Locking cover3,Stainless steel cover 11,Parameter labels4,Header casing 12,Photoelectrlc interface5,Battery and holder 13,M ... power<10uA,Battery life>10 years, Largescreen and doublerow row display, Backlit display when External powersupply,Characters size up ...