ize can be adult and youth. We can print a logo on the central part of it. Capacity can be 512MB, 1GB, 2GB, 4GB, 8GB, 16GB, 32GB,64GB. Operating Temperature is -32°F to 140°F (0°C to 60°C). Storage Temperature is -4°F to 185°F (-20°C to 85°C). Read speed 18M/S,write speed:3.8M/S (USB2.0). Working voltage is customize keychain5V with wrking power 300mA. Guaranteed 2 ear warranty. Operation system Windows 98/ SE /ME /2000 /XP/ 7/ Vista, Linux 2.4.x, Mac Windows 7, etc. The advantage of our product. 1. Make logo according to customer"s design, 2. File preload, files can be non-erasable. 3. Advertisement files Auto-play once USB was plugged into the computer. 4. Website auto pop-up once USB was plugged into the computer. 5. Disk partition. 6. Password protection. silicone-wristbandrubber-message-bracelets silicone wristbacustomize keychainnd all in wholesale price with your own design even 1 pcs. Why we can do it ? We have our own designers, so we can make all the digital proof free, no matter you order or not. We have our own factory and reliable suppliers for the raw materials. We can get cheaper price of silicone rubber for large quantity as we produc thousands wristband per day. We have advanced machines, skilled workers and efficient production process. We get low negotiated price from the courier. So we sell the wristbands in wholesales price. So how to buy it? You can place an order directly on our website or we place it for you. All the detail needed is wristband style, colors, size, quantity and the message or logo on the wristband. We will make digital proof and send for confirmation before mass production. Welcome to place the order.