IVF-RH02 and IVF-RH04 reader elf is a portable mini reader that can link with iOS system platform through 3.5mm headphone jack to use. It has the characteristic of plug-and-play, light and small size, low power consumption, built-in rechargeable battery, etc, and is easy to carry, truly make mobile identify tag at any time, anywhere, as you wishes. It’s applicable to anti-counterfeiting terminal device, etc.