Welcome to the store! This unit is used to copy and duplicate 125 Khz EM4100 ID cards for backup. Excellent program algorithm and circuit design are used. You can copy any ID(EM4100) cards with this RFID copier. Portable size, easy to carry. Features: 1. Mini-type handheld format, ergonomic features, easy to carry. 2. Only "Read" and "Write" two buttons, easy to use. 3. You can copy any ID(EM4100) cards with this RFID copier. 4. Using advanced chip, product integration is higher, more stable, and reliable. 5. Excellent program algorithm and circuit design reduce power consumption and extend battery life (Battery is not included in the package). 6. Widely used in communities, schools, offices, and other places where access control is needed. Specifications: Frequency: 125 KHz ID single frequency read and write copier Support reading chip: TK4100/EM4100/EM4200/TK4100-D Support writing chip: T5577/EM4305/5200/8265/8268/8800, etc. Copy Number of times: >20,000 times Battery Type: 2 x AAA batteries (not included) Size: Approx. 11.5 x 7 x 3 cm / 4.6 x 2.8 x 1.2 inches Weight: Approx. 162g Package list: 1 x RFID copier without battery 6 x Rewritable key tags 6 x Rewritable cards (EM4305) 1 x User Manual