... 320*240Control Standard:UTILITY KEY,SVC KEY,FVC KEY,MVV KEY,PRINT KEY,10WORDS KEY,[ ]KEY, KEY,START KEY,STOP KEY, KEY KEY KEY KEYLight alarmMeasurement meansFlow velocity detection ... rangeCapacity range: 0L ~ 9LFlow velocity range: 0 ~ 14L / s measurement accuracy Capacity:0L ~ 1.6L (± 50ml) 6L ~ 9L ... 50mm/s±2Power supplyAC: 100V~240VDC: rechargeable Nickel-metal hydride (NI-MH), 14.4-volt, 1.8 amp ...