USB FLASH MEMORY DRIVE WATCH USB1.1 Read: 1000kb/s，Write 920b/s Real hot plug, and play,　red/green LED light lighting shows plug and flashing shows read watch with integrated flash-memory, Japan movement with date display, butterfly-clip, exchangeable USB-plug in strap integrated, chip real hot plug & play, password protected, water resistant Material: Stainless steel ABS case with stainless steel/leather/PU band weight only 50 grams, the diameter 45 mms, 17 mms utmost in thickness. the watchband.