BENETECH GM8905 Handheld Digital Laser Tachometer, Range: 2.5-99999RPM, GM8905 Video DoorBell Calculator

Calculator

soft and tough

Convert the complete VGA signal to HDMI and VGA video output at the same time

Fast charging and providing overcharge protection system / short-circuit / overload protection / over-heat protection

parental control

BENETECH GM8905 Handheld Digital Laser Tachometer, Range: 2.5-99999RPM, GM8905 Video DoorBell Calculator1. 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 operation Specification: General Certificate CE