1. Measurement precision Repeatability: With repeatability less than or equal to 0.1 display accuracy 0.1, just you can get accurate color measurements with one click. 2. Contact automatic calibration: Contact automatic whiteboard calibration is available, professional standard whiteboard reflectivity R% greater than equal 92%, good surface uniformity. It has high stability and can obtain repeated and accurate data. 3. Professional integrating sphere dual optical path design: Professional advanced integrating sphere coating, dual optical path sensor and full-spectrum light source ensure the stability and accuracy of the measurement results. 4. Lightweight and portable: Easily put it in your pocket, carry it with you, worry-free measurement. 5. Rechargeable lithium battery: Type-c interface, can do continuously tests for 12,000 times in a single full charge. Higher Quality: Using industrial-grade real-time processing MCU, Bluetooth interface 5.0 transmission is more stable and reliable. Diversified Data Display Modes: The Color Reader CR4501 with APP can directly display the sample color value, color difference value, pass/fail result, color simulation, color deviation, reflectance and other data, which is convenient for viewing and greatly improves the user's work efficiency. Massive Color Card Database with You: APP synchronizes mass storage,can quickly check color data, analyze and compare. Use the App to build your private color database in the cloud, without having to carry heavy color cards, you can use CR4501 to find the closest color among multiple color cards anytime and anywhere. Note: the difference of words does not affect the use. Color:Black Material:plastic Package Contents: 1 * Color Reader 1 * Data Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.