1. 5-digital LCD with 18mm character in height 2. Unit: rpm 3. Measuring range: 2.5-99999rpm 4. Resolution: 0.1rpm (2.5-999.9rpm); 1rpm (1000-99999rpm) 5. Basic precision: +/-(0.1%n+5d)rpm, (2.5-999.9rpm); +/-(1%n+5d)rpm, (1000-99999rpm) 6. Laser power: CLASS II 2-5mW 7. Sampling rate: 1second/time 8. Measuring distance: 50-500mm 9. Time base: Quartz crystal 10. Auto power off: 1 minute without any operationSpecification: General Certificate CE Model GM8905 Types Tachometer Material ABS Resolution 0.1rpm (2.5-999.9rpm); 1rpm (1000-99999rpm) Measure Range 2.5-99999rpm Operating Temperature 0 ~ 50 Degree Celsius Power Supply 2*1.5V AAA batteries (not included) Size 55.7*29.9*127mm Display Size 1.8 inch Weight 97g Package Include Package Contents 1 x Manual 1 x Tachometer Package Weight One Package Weight 0.18kgs / 0.39lb One Package Size 16cm * 8.5cm * 4.5cm / 6.3inch * 3.35inch * 1.77inch Qty per Carton 60 Carton Weight 12.70kgs / 28.00lb Carton Size 45cm * 36cm * 32cm / 17.72inch * 14.17inch * 12.6inch Loading Container 20GP: 514 cartons * 60 pcs = 30840 pcs40HQ: 1194 cartons * 60 pcs = 71640 pcs