Display unit: MG/DL or mmol/L dual units switchable Measuring range: 20-600mg/dLto1, 1-333mmol/l High-: accurate test results and stable readings, helping you obtain accurate hemoglobin levels and effectively monitor and manage status. Screen: LCD Storage: 180 memory groups Measurement time: less than 7 seconds Application: Time and Date Automatic shutdown: no operation for 3 minutes Working temperature: +10C to +40%C Storage temperature: +4C to +32C Power supply: 2 AAA batteries, approximately 1000 measurements Sample type: capillary blood or venous blood Hematocrit range: 20%-60% Less than 85% Material: plastic colour: As Shown Package Contents: 1 x instrument 50 x test paper 50 x piece needle 50 x alcohol cotton pads Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.