Welcome to our store! 1. Mini handheld design, ergonomic features, easy to carry. 2. Only "Read" and "Write" two buttons, easy to use. 3. Adopts advanced chip, higher product integration, more stable and reliable. 4. Excellent program algorithm and circuit design reduce power consumption and extend battery life (Battery not included). 5. Widely used in communities, schools, offices, and other places requiring access control. This device is used to copy and duplicate 125 KHz EM4100 ID cards for backup. An excellent program algorithm and circuit design have been adopted. You can copy any ID (EM4100) card with this RFID copier. Portable size, easy to carry. Features: 1. Mini handheld design, ergonomic features, easy to carry. 2. Only "Read" and "Write" two buttons, easy to use. 3. You can copy any ID (EM4100) card with this RFID copier. 4. By adopting an 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 not included). 6. Widely used in communities, schools, offices, and other places requiring access control. 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 Times: >20,000 times Battery Type: 2 x AAA battery (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 Writable Key Tags 6 x Writable Cards (EM4305) 1 x User Manual Guaranteed Satisfaction: Customers are our top priority. If you find any problems with the product, please contact the seller immediately. We strive to provide satisfactory after-sales service.