DETAIL Lutron DT-2244 DIGITAL TACHOMETER :

• Measurement and range : 10 to 99,999 RPM
• Resolution : 0.1 RPM (<1,000 RPM) 1 RPM (1,000 RPM)
• Display :  5digits, 10 mm (0.4 inch) LCD
• Accuracy : ± (0.05% + 1 digit)
• Time base : Quartz crystal
• Circuit : Exclusive one-chip of microcomputer LSI circuit
• Operating temperature : 0^◦C to 50^◦C ( 32^◦F to 122^◦F ).
• Operating humidity : less than 80% RH
• Memory : Last/Max./Min…. value
• Battery : 4 x 1.5V AA (UM-3) batteries
• Power consumption : Approx. DC 153 mA
• Size : 165x61x38.5 mm
• Weight : 235g /0.52 LB (including battery)