Random access Available for one by one test at any position. Compact & Stylish Smart Rate 10: 2.6kg Smart Rate 20: 2.7kg Smart Rate 40: 3.0kg Rapid measurement Quick mode: 30 min value and 1hr value – 15 min working time 2 hr value – 45 min working time Low biological risk Our tube is vacuum tube with a sterilization. No need to transfer samples and low risk for infection.