2 Packing detail 1 pcs SD Card or SD Card +Card Reader Products description storage capacity: 4GB/8GB/16GB/32GB/64GB/128GB/256GB Environment Temperature: -40°C – +70°C Storage Temperature: -50°C – +80°C USB Service Voltage: 4.5V-5.5V Storage Lifetime: More than 10 years Use A-class chip, can be erased repeatedly for 100,0000 times Operating System: Win98/ME/2000/XP/ Vista/win7/win8 , Mac OS 9.X/Linux2.4 or above USB connection,support Hot plug & Play. Easy to read and read in high speed ,No need drive/power supply only plug in. Warranty 1) All the items has 12 months warranty. 2) If the item is defective use by technical reason,you could sent back to us for New one. Customers are responsible for 2-way shipping charges on any returned items. It may take up to 7 business days to process your return after we receive your product. 3) All items must be returned in their original condition, In order to qualify for a refund or exchange of goods. 4) Our warranty does not extend to any products that are physically damaged or that are not under normal operating conidtions as a result of misuse or improper installation. 5)No refund accepted after 30 Days of receipt. 6)Items returned after 7 days of delivery are only eligible for repair. Feedback 1)Your Feedback is really important to us, please take a few seconds to leave great feedback if you are satisfied with our product or service, thank you so much !! 2)We support original Products ,Give more High Level Services Contact us If there’s any problems or questions about you order, please contact us by email or trademanager ,we will reply within 24 working hours.