The product automatically detect when connected to the device to be tested. The up and down fluctuation switch cause the product to undergo inspection. New architecture with abundant materials. Compact structural design allows for ultimate compression of product volume, making it portable and user-friendly. The product is equipped with a built-in lithium battery, which can meet the long-term testing needs of the product. Support Type-C of mobile phones and laptops and so on. Battery capacity: 400mAh Supported models: for interface 8P Interface detection. Type-C24P Interface detection. 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. Colour:Black Material:Plastic Package Contents: 1x Mobile Phone Tail Insertion Detector 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.