Working Voltage: 4.75-5.25VWorking Current: 20mAButton Life: More than 5 million timesDimension: 405*200*17mmWeight: 600.0gSupport System:win98/2000/ME/NT/XP/Visa/07/MacWarranty: 1 Year for the quolity warrantyNumber of key :104Interface: USBLogo :neutral or our JEDEL logo, or your logo