Specifications: Read EM4100 or TK4100 keys and cards. Read and copy and duplicate the 125Khz EM4305 CET5557 T5577 5200 EM4205 cards and tags. Supports 125Khz EM4100/EM410X or compatible cards and tags formats (HID standard not compatible). Built-in individual LED lights and buzzer indicator. Built-in transceiver antenna. Read/writable card & key fobs can be cloned and copied more than 20000 times with difference IDs. Item Name: Handheld RFID Writer Frequency: 125KHz Power Supply: 2 x AAA Batteries (Not Included) Voltage: 3V Features: Mini, Portable, Handheld Size: 115cm x 70cm x 30mm/4.53" x 2.76" x 1.18" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 3 x ID Cards or 1 x Handheld RFID Writer or 3 x ID Cards 1 x Handheld RFID Writer