Official True MFi Certification: With the original C94 connector and MFi certified chip, this usb c to lightning has completed MFi certification requirements and rigorous quality testing to ensure your iOS devices are charged safely at the fastest possible speed; No warning messages to disturb you, plug it in and it works, completely hassle-free. (Enter "Ugreen" or product model number in MFi Licensed Accessories to confirm) PD Fast Charge and Data Transfer: this USB C to Lightning cable fast charging charge your iPhone 14 from 0% to 60% in just 30 mins; The charging speed is 3X faster than the USB A to Lightning cable, It transfers data at 480 Mbps, meaning you can move 1GB of movies, music, documents, or an entire photo library in 30 seconds Universal Compatibility: UGREEN USB C to Lightning Cable supports fast charging for iPhone 14/14 Pro/14 Pro Max and previous versions, such as iPhone 13 series, iPhone 12 series, iPhone 11 series, iPhone X series, iPhone 8 series, AirPods; Standard Charging Speed works with iPhone 7 Plus, 7, 6 Plus, 6, 6S Plus, 6S, iPad Mini 4/3/2, iPad Air 2/1, iPad 6/5, iPod touch 6, etc Ultimate Durability: USB C to lightning cable fast charging withstands 15,000+ times bending test and 10,000+ plug/unplug tests; Besides, a durable nylon braid is built for extra protection and durability, which extends the life far longer than the other USB C to lightning cables Perfect Length: 6 feet extra long type c to lightning cable, no longer limited to fixed charging locations, perfect for use at home, in the car, and in the office Product description WHAT IS MFi ? MFi is a kind of express license for external accessories produced by authorized accessory manufacturers. It is the abbreviation of ‘Made for iPhone / iPod / iPad’. The certification test process is extremely demanding, with a pass rate of only 2%. Is this cable MFi-certified ? The USB C to lightning cable we sell is a MFi-certified Lightning cable. You can log in to the official iphone MFi Licensed Accessories and search our brand "Ugreen" or product model number of this term to confirm. Q: Why does the phone get hot when it's charging? A: This is normal, because the phone will generate some heat when it is charging. However, the main reasons for the heat are as follows: 1. The charging speed will be faster when the phone power is low, the wall charger will output 9V high voltage, and the phone will generate heat because of the voltage converting process. 2. There are too many programs running in the background of the phone, causing the phone to run at a high load and generate more heat. Recommendations: 1. Clean up the running program of the phone with high power consumption in the background in time. 2. Don't play the phone while the phone is charged with low power, otherwise the phone will be in a high load state. Ultra Durability & Data Transfer & MFi Certification Approved About the error message "This accessory may not be supported by device" : The message would appear if you were using an unauthorized wall charger or in poor contact, but even if you are using an original iphone accessory, the error can also happen for the firmware problem with iOS. After analysis, the causes of this problem may be the following: · Device lightning port contains impurities such as fiber and debris, resulting in poor contact. · The voltage of the wall charger is too low or unstable, resulting in insufficient power supply. · The lightning end is corroded/stained, resulting in poor contact. · Circuit logic problems/system problems with charging equipment. · The chip or mainboard of the cable is damaged. You can try the following solutions: · You can use a pushpin to clean out the pocket lint or debris from the charging port. · Wipe the Lightning end with a tissue to remove dirt and oxidation marks on the lightning end. · Use the original charger or MFi authorized charger, because some laptop USB output ports may have insufficient power output. · You can use a pushpin to clean out the pocket lint or debris from the charging port. · Wipe the Lightning end with a tissue to remove dirt and oxidation marks on the lightning end. · Use the original charger or MFi authorized charger, because some laptop USB output ports may have insufficient power output.