High Sensitivity: Operation, No Connection To Computer/pc Required. Built-in Ceiver Antenna, High Sensitivity And Fast Read And Write Speed. Hand Shape Design, 2 Buttons For Easy Operation, Comfortable . Easy To Use: Built-in Individual Led Indicators And Buzzer Display Indicate The Operation Of Your Operation. Supports Em4100 Em4200 Versions. Supports Only 125khz Em4100/em410x Or Compatible Card/tag Format (hid Standard Not Compatible!). Multi-function: You Can Get The Same Pair Of Hid And Id Cards For Other Purposes. Easy To Copy: This Id Card Reader Is A Portable 125 Khz Rfid Card Making Machine That Can Easily Copy And Write The 125 Khz Hid/id Card Number. Colour: Blue Material: Plastic Package Contents: 1 * Rfid Hand Copier (without 2*aaa Batteries) 5 * Rewritable Rfid Keyrings Only The Above Package Content, Other Products Are Not Included. Note: Light And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +