1) Solar usb drive Size:60.7*19.9*11.3mm 2) Compatible with USB version 1. 1/2. 0 3)Capacity: 64MB-4GB 4) Copper housing 5) Hot plug and plays via USB port 6) No external power supply required 7) Write speed: 650kbps 8) Read speed: 958kbps 9) Data retention for over 10 years 10) Supports Win98/Me/2k/XP, Mac OS 8. 6 and above. Used flash disk with solar shine OEM PMS color printing and logo, trademarks, slogans are available!