USB Card Reader does not require any external power source. This Card Reader supports operating system line Windows and Linux. USB Card Reader is manufactured by Star Link Communication Pvt Ltd which is an ISO 9001: 2000 accredited company Star Link Communication Pvt Ltd also manufactures computerized access and attendance recording systems, biometric access control system, biometric access control device, digital access control system and digital access control device. The USB Card Reader can be wall mounted and is suitable for outdoors and indoors. This Card Reader uses extremely low power and has a reading distance of 60 mm.