?The tachometer uses microcomputer(CPU) technique; photoelectric technology， anti-jamming technique and junction laser technique for non-contact measurement of rotation speed(RPM)， frequency(Hz) and total cycle(Total).

Features:
Wide measuring range and high resolution.
Large screen LCD display provides clear reading.
Automatically save Max， Min and last values， also save 96 sets of continuous data.
The tachometer starts to store data after first reading.
Low battery voltage indication.
Smooth housing design， comfortable to hold and use.
The tachometer uses microcomputer(CPU) technique; photoelectric technology， anti-jamming technique and junction laser technique for non-contact measurement of rotation speed(RPM).

Specifications:
Color: Dark Blue + Dark Gray
Material: Plastic
Display: 5 digital， 18mm LCD
Range: 2.5~99999 RPM; 0.05~1666Hz; 1~99999 Count
Resolution: 0.1 RPM (2.5~999.9RPM); 1 RPM (above 1000RPM); 0.01Hz(0.05~99.99Hz); 0.1Hz(above 100Hz)
Accuracy: ÷(0.05%+1 digital)
Sampling Time: 0.8s(over 60RPM)
Range Select: Auto-Ranging
Time Base: 6MHz Quartz Crystal
Memory: Max. Value， Min. Value， Last Value
Detecting Distance: 50mm-500mm
Power: 3 * 1.5V AA Batteries (not included)
Item Size: 155 * 70 * 35mm / 6.1 * 2.75 * 1.38in (L * W * H)
Item Weight: 143g / 5.06oz
Package Size: 20 * 15 * 5.5cm / 7.87 * 5.9 * 2.16in (L * W * H)
Package Weight: 424g / 14.96oz

Package List:
1 * Digital Tachometer
3 * Stickers
1 * Screw
1 * User Manual (English)