Bunny Cartoon USB Flash DrivesSpecifications:MaterialPVCWeight20gPackagePolybag or gift boxWriting speed4-8 MB/sRead speed10-20 MB/ sData Retention time10 yearsWarranty3 yearsUSB interface2.0PaymentPayPal T/T WUFeaturesCapacity: 128MB, 256MB, 512MB, 1GB, 2GB, 4GB, 8GB, 16GB, 32GB, 64GBDelivery time: generally 3-7 days after payment done for quantity less than 500pcs. Exact time depends on quantity.Operating system: works on all main operating system.Service: Data freeload, Non-Erasable, Auto running, Encryption, Custom Icon Creation, Locked / Hidden contents. Application: Corporate gifts, business gifts, Promotional gifts, Personal needs, Advertisement, Resell, etcAbout usb capacity:The real capacity of usb on computer is different from the said capacity from supplier because the conversion way is different between MB and GB. Computer counts on 1024 while suppliers count on 1000. So the real capacity is always less than the said capacity. Generally the real capacity is about 90% of the said capacity.For exampleFor 4GB, the real capacity is about 3.5-3.8 GB;For 8GB, the real capacity is about 7.2-7.6 GB;For 16gb, the real capacity is about 14.5- 15.2 GB.