NOTE: Never use both connections simultaneously! Please don't be hesitated to contact us directly. We are very willing to help you solve any problem. Your satisfaction is most important to us. PRODUCT FEATURES: 1. Interface: Micro USB and USB 2.0 connectors. 1x SD/MMC slot, 1x Micro SD/TF slot 2. Support SD, SDHC, SDXC up to 64GB. 3. Support memory card with FAT 32 file system. Not compatible with NTFS & exFAT formats. 4. Compatible with Micro USB andriod mobile decives with OTG function. COMPATIBLE DEVICE(list is not comprehensive): Samsung Galaxy S6/S6E(+)/Alpha Samsung Galaxy S5 only Samsung Galaxy S4 only Not For Samsung Galaxy S3/S5 mini/S4 mini Samsung Galaxy Note 5,4,3,2 Samsung Galaxy Note Edge Samsung Galaxy Note Pro Samsung Galaxy Note 10.1 from 2014 onwards Samsung Galaxy Note 8.0 from 2014 onwards Samsung Galaxy Tab pro Samsung Galaxy Tab 3 10.1, 8.0 (NOT FOR 7.0) Samsung Galaxy Tab 4 10.1 (NOT FOR 7.0) Google Nexus 5/6/7/9/10 with help of third-party app such as 'nexus USB OTG file manager,
ES file explorer, Nexus media importer'. Not For Nexus 7 2013 edition!* Not For HTC one M9/M8 LG G4/3/2/1, G Pro 1/2 Not For Moto G Not For Hudl 1/2 * This kit does not support amazon Kindle & Fire tablets* Host/OTG compatible smartphones and tablets with Android operating system as of Android 4.0 and a micro USB interface

• The standard USB 2.0 plug (type A) and micro USB plug (type B) combination, making the card reader compatible with all tablets and Android smartphones that support OTG function.
• USB 2.0 SD/microSD card reader for data transmission, compatible with electronic devices such as PC, Laptop, Smartphone & Tablet
• OTG cable provides a convenient and alternative way for PC/Laptop to view picture,listen to music,data transform from flash drivers
• Compact card reader for all standard SDHC/SDXC and micro SD/micro SDHC/micro SDXC. ****Does NOT support memory cards over 64GB because of limited current provided by mobile device.
• Does NOT support memory cards over 64GB because of limited current provided by mobile device.

The standard USB 2.0 plug (type A) and micro USB plug (type B) combination, making the card reader compatible with all tablets and Android smartphones that support OTG function.Coolmall369