1. Using a 1.54-inch large color screen, you can observe more protocols and charging information in real time 2. Compatible with most mainstream protocols on the market 3. Support OTA upgrades, often used and 4. 21+ functions support testing and are continuously updated. Capacity: 1MB Accuracy: 1% Screen size: 1.54-inch BOE color screen Operating temperature: 15°C--70°C Protocol three-in-one BPP 5W EPP 15W surging fast charge MPP 15W fairy second charge Note: Installation guide not included, we strongly recommend you seek professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: Black Material: plastic Package Contents: 1 x Wireless Power Tester 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.