Colorimeter 3.5in Touch Screen Built In Multiple Electronic Color Card QC Detection Function Color Matching Tool for IOS Item Type: Colorimeter Material: ABSWeight: Approx. 225g/8.0oz Battery: 1 x Rechargeable Lithium Battery 3.7V 4000mAh (built in battery) Uses: Chroma Sampling, Color Difference Detection and Comparison Lighting Method: 45/0 (45° circle lighting, 0° reception) Lighting Source: Full Spectrum LED Light Source Measuring Diameter: Approx. 8mm/0.3in Measurement Conditions: Light Source D65, Field of View 10° Measurement Time: About 1s Color Spaces: Color Model, Luv, LCh, Yxy, CMYK, RGB, Hex Color Difference Formula: △E*ab, △Euv, △E*94, △E*cmc(2:1), △E*cmc(1:1), △E*00 Repeatability: Standard Deviation △E*ab within 0.03 (measurement conditions: after warm up correction, measure the average value of 30 whiteboards at intervals of 3s) Battery Power: 1 x Rechargeable Lithium Battery 3.7V 4000mAh, Can Measure 10000 Times Continuously After a Single Full Charge Display: 480 x 320 Dot Lattice IPS Color Screen System Language: Simplified Chinese, English  Charging Interface: USB (type c) Data Transmission: USB, BT Operating Temperature Range: 0-45℃, 0-85%RH (non condensing) Storage Temperature Range: -25-55℃, 0-85%RH (non condensing) Storage Space: Color x 1000 Color Difference Contrast x 1000 Color Threshold: Can Be Set Compensation Light: Built in Chromatic Aberration In the Color Difference Contrast Measurement Interface, Click the "standard Color Measurement" Button, and the Current Measured Value is Used As the Standard Color. Click the "sample Color Measurement" Button, the Current Measured Value is Used As the Sample Color. if You Press the Instrument Button for a Short Time, a Color Measurement Will Also Be Performed, and This Measurement Value Will Replace the Previous Measurement Data. When the Standard Color is Measured or Added, and the Sample Color is Measured, the Color Difference Between the Two Colors is Calculated. the Color Difference Comparison Results Generally Have the Following Three Judgments: LabCh Difference The LabCh Difference Value a is the Sample Color Data Minus the Standard Color Data, and the Color Cast Direction Between the Two is Judged by AL, Aa, and Ab. Value of AE The Value of AE is Calculated According to the Selected Color Difference Equations. QC Testing QC Detection is Suitable for Color Difference Detection in the Production Process. if the Calculated Ae is Greater Than the Set Threshold, It Will Display "unqualified", and the Judgment Area Will Display Red; if the Calculated AE is Less Than or Equal to the Set Threshold, It Will Display "qualified ”, the Judgment Area is Displayed in Green. 4.BT Connection 1. App Installation Colorimeter App Supports for Android 7.0 for IOS 7.0 and Above. Choose One of the Following Methods to Install: (1) Scan the QR Coding of the Manual with a Mobile Browser or Wechat, and Follow the Prompts to Download and Install The App. (2) Search for LScolor from the App Market, and Follow the Prompts to Download and Install APP.