ITEM NAME:Lenovo D231 Dual Slot Memory Card Reader USB 3.0 TF Security Digital Card Reader Product Description Description: Lenovo D231 2 in 1 USB 3.0 Memory Card Reader Dual Slot TF Security Digital Card Reader Adapter Feature: Support up to 2TB card. Support reading one card at a time. Compatible with a wide range of memory cards, high-speed transmission. Specification: Brand: Lenovo Model: D231 Colour: Black Connector: USB 3.0 Theoretical transmission speed: 5Gbps Supported card type: TF card, Secure Digital card (read only one card at a time) Supported capacity: maximum 2TB Operating system compatibility: for Windows XP /7/8+; for Mac OS X 10.5+; for Linux 2.4.x+ Product size: 70*18.5*10.5mm/2.76*0.73*0.41" Product gross weight: 21.6g Note: 1. There may be slight size deviations due to manual measurement, different measuring methods and tools. 2. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. Included: 1 X Memory Card Reader.Model: D231. Connector: USB 3.0. Support up to 2TB card. 12 months Warranty. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.