1、There is a separate USB interface on this adapter cable, which can be connected to a charger or data cable to power the equipment being used, such as external USB keyboard, mouse, card reader, U disk and mobile hard disk. 2、Charging of OTG mobile phones or tablets is not supported, and USB mobile hard drives require external power to use. 3、Micro USB male‑to‑USB female OTG cable can also be used for OTG transmission of mobile phones, tablets, MID, UPMC, and e‑books with Micro USB OTG interface. 4、For Android / Windows and other systems are applicable, there is no system restrictions. 5、When there is no computer as a transfer station, such cable directly connect the phone to external devices for data transmission and input operation such as U disk, card reader, MP3, keyboard, digital camera, etc. 2 x Mobile Phone to U Disk Cable Item Type: Mobile phone to U disk cableModel: C0205Applicable to: Expansion of various devices with OTG functionInterface: USB 2.0 female TO Micro USB 2.0 x 2 (male and female)Explanation: Mobile phones and tablets with OTG function can use this extension cable