We are offering finger print base attendance system.model f 30 f30 tu : fp+usb f30 tud : fp+usb + card f30 tudb : fp+usb+card+battery t & a software free ‘a1’ features user capacity 2000 fp logs capacity 50000 arm7 high speed processor identification time >1 sec. Rs232,rs485,tcp/ip,usb 500 dpi optical sensor *sdk available