Usage Tips:ACR1311U-N2 Bluetooth NFC Reader combines the latest 13.56 MHz contactless technology with Bluetooth Smart connectivity for on-the-go smart card and NFC applications. USB 2.0 interface Bluetooth 4.0 smart interface Plug and Play - support brings utmost mobility USB Firmware Upgradeability Smart Card Reader Application Programming Interface Supports for Android 4.3 and above Supports for iOS 5.0 and later Built-in Peripherals Interface:USB Model Number:ACR1311 Protocol:USB Connector Type:Micro-USB Operating Frequency:13.56MHz Power Source:Rechargeable Lithium-ion Battery Colour:White Material:plastic Package Contents: 1 x NFC Reader(Due to different product batches, the appearance , which does not affect the use) 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.