The laser-enabled DT-205LR has precise RPM measurement up to 20 feet. The DT-205LR digital tachometers incorporate laser technology yet retain a rugged construction and reliable quality components. Specifications include... Display: 6-99,999 rpm Measuring Distance: 1" - 20' / 25mm - 6m 13 Readings stored in memory for 5 minutes Detection: Laser and Contact Weight: 0.8 lb Package includes... Main Unit Reflective Tape 2 Cone Adapters Funnel Adapter 3.5" Extension Shaft 6" Master Wheel NIST Cert Carrying Case The laser-enabled DT-205LR has precise RPM measurement up to 20 feet. The Series DT-205LR digital tachometers incorporate laser technology yet retain our hallmark rugged construction and reliable quality components. Units offer incredible value and versatility as they can operate in non-contact and contact applications. These instruments feature a field-upgrade-able contact adapter for linear rate measure, conveniently allowing both non-contact and contact measurements. Incorporating the precise laser technology and user-friendly functions as the DT-205LR tachometer, the DT- 205LR-S12 provides an exceptional accuracy in measuring speed and length via its 12” wheel. The larger wheel rotates more slowly than a standard 6” wheel, enabling reliable and safe registration of high speeds. All Series 205LR units come standard with a NIST traceable calibration certificate. We’re confident you’ll agree that these fine units are the most advanced handheld tachometers on the market!