Features 1、ACCURATE MEASUREMENT: Highly precise digital tachometer, laser-aimed, non-contact and safe, fast measures ranging from 2.5~99999RPM, with 50~500mm detecting distance. 2、LCD DISPLAY: Designed with LCD backlit screen, it clearly shows the values, allows easy reading of data even in darkness, and comes up a battery icon when in low power. 3、MORE FUNCTIONS: Multifunctional tachometer features with data record(60 readings), record interval time setup, data hold, max./min./avg. measurement, auto-off for energy saving. 4、COMPACT DESIGN: Well-made tachometer, comfortable to grip, powered by 1 x 9V 6F22 battery, has portable lightweight body, convenient to carry anywhere. 5、WIDE APPLICATION: This tachometer is suitable for measuring rotating speed of model cars, machine, motors, wheels, lathe for metal or wood cutting work etc. Specification Features: 1.Portable: Lightweight and small size. 2.Over-Current Protection Design. 3.Durable and practical. 4.A great alternative choice to memory RAM adapters. 5.It is a Professional Laptop DDR4 SO-DIMM To Desktop DIMM Memory RAM Connector Adapter Card from 260 to 288. Specification: Frequency: 2133Mhz Frequency SO DDR4 Memory. PCB Design: 4-Layers. Compatible with: JEDEC standard. Dimension: approx.133x36mm/5.23x1.41'' Package list: 1 x Memory Cards Converter Adaptor Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List 1 x Memory Cards Converter Adaptor