Equipped with simple "Read" and "Write" buttons, this compact RFID reader/writer needs no computer. Note: 2 AAA batteries are NOT included-please prepare them yourself before use. After installing batteries, you can cloning 125KHz ID cards anytime, anywhere. This handheld RFID cloner supports writing to T5577, EM4305, CET5200 cards. It also reads/clones ID (EM4100), HID, AWID 125KHz proximity cards. Important: Not compatible with encrypted cards. Please check your card's type/compatibility first. Ideal for copying parking cards, access badges, key fobs, etc.-works for home, office, or apartment access control systems. To success: Follow the included user manual's operation steps (e.g., correct "read→write" process, using compatible blank cards). Kit includes: 1 RFID writer, 6 blank key fobs, 6 rewritable white cards. All tags are reusable (support multiple writes) but arrive blank. Note: Blank tags must be written with data from an original card (follow the manual for cloning steps). This RFID duplicator exclusively supports 125KHz low-frequency cards. Not suitable for 13.56MHz or other frequencies-please confirm your card's frequency before purchase. Color: As Shown Material: plastic Package Contents: 1*set rfid copier Only the above package content, other products are not included. Note: Light reflection 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 +/- 1-3cm.