Technic parameter: Metering unit: mg/dL; mmol/L Blood volume: 1?l Measuring time: 8 seconds Measuring range: 20mg/dL( 1.1mmol/L )~ 600mg/dL( 33.3mmol/L ) Memory capacity: 250 test results Average results: 7 days, 14 days, 1 month, 2 months and 3 months Hematocrit range: 30%~60% Ambient temperature range: 10?~40? Relative humidity range: <85% Power: one 3.0V lithium button cell The validity time of blood glucose test stirp: 24 months