... 4. MOQ: 300PCS USB Name Card, 4GB Card Shape USB Memory Stick Features:| Available capacities : 1GB, 2GB, 4GB , 8GB,16GB ... Speed Interface, Supply Hot Swap and dual drive, High Speed Read Write.| USB Voltage Bus: (4.5V-5.5V)| ... 70°C| Storage Temperature: -50°C ~ +80°CMain Features:1. read-write speed: 6M/S , copy speed: 12M/S2. support USB ... proofing USB Name Card, 4GB Card Shape USB Memory Stick