Feature: 1. Stable Performance: Contactless card reader is suitable for Android ( for VIVO, for Xiaomi), support for WinXP/for Win7/for Win10 systems, etc. (need to pass OTG transmission line). 2. Plug and Play: This smart card reader connects directly to your phone to use, requiring no drive or transmission line. 3. Buzzer and LED Indicator: Built in buzzer can sound up to 20dB, there will be a sound prompt when the card is activated. In addition, LED indicator is located on the right side of the card reader, blue means the standby state. 4. Compact and Durable: Scratch resistant and wear resistant, exquisite and compact design makes the card reader easy to carry and use. 5. Application Scope: Can be widely used in conference sign in, home school pass, access control and other application fields. Specification: Item Type: Card Reader Material: ABS Model: R65 Color: White Communication Interface: Type-C Interface Operating Frequency: 125Khz (R65D) / 13.56mhz (R65C) Card Reader Type: TK4001, EM4100 And Other ID Cards (R65D), MF\S50\S70 And Other ISO14443A Agreement Label (R65C) Card Reading Distance: 0~30mm/0~1.2in (Front/Back), 0~10mm/0~0.4in (Side Reading) Card Reading Time: