SPECIFICATIONSBrand Name: exuanckCertification: CE,FCC,RoHSEncryption: NoHigh-concerned chemical: NoneInterface Type: USB 2.0Material: metalModel Number: usb 2.0Origin: Mainland ChinaPackage: YesProduct Type: Flash Disk1.Free LOGO Laser . (logo be white colour) 2.We will make sample and send you photo for checking before make all.3.LOGO can be JPG, JPEG, GIF, PNG, BMP, PDF, AI ,format,limit size to upload on page is 5MB. 4.after order send  your logo to us within 2 hours , otherwise , we will ship the items to you without logo ,pls send a "pdf" or "ai" format vector file logo to my gmail . also pls remark your order id in it . Operating Temperature: 32° F to 140° F (0° C to 60° C)Storage Temperature:  -4° F to 185° F (-25° C to 85° C)Power consumption: 4.5V - 5.5VSupport OS:  Desktop or notebook computer with USB portWindows 7, 8Window VistaWindow XP / 2000 / MEMacintosh Mac OS 9.0 or later and Mac OS 10.1 or laterSpeed may vary due to hosthardware, software and usage. Read: Slowest 6MB/s, the fastest 25MB/s,Write:Slowest 5MB/s, the fastest 12MB/s.The actual available memory on the device is less than what is listed on the package.1GB=1,000,000,000 Bytes. In OSsystem, it would be displayed as 1,000,000,000 Bytes/1024/1024/1024 =0.93GB. A certain portion (1~3%) of the storage capacity might bereserved for firmware and maintenance use.About real capacity8GB   = approximately 7.4GB-7.6GB16GB = approximately 14.5GB-15GB32GB = approximately 28GB-30GB64GB = approximately 58GB-60GB128GB = approximately 110GB-120GB1. We use AliExpress Standard Shipping ,ePacket ,EMS,DHL,we will add tracking number to your orders page,2. All packages are Air Mail.3. We will try our best to make a fast shipment (after you offer)Feedbacksare highly valued , if you have any questions about our products , plscontact us first ,we will try our best to solve it :100% communication,100% exchange ,100% re-send or 100% refund for you .if you like ourproducts like exuanck store , hope you can leave a 5stars , thanks!!!!