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Product Description What is Proxmark 3? The Proxmark 3 is a dedicated, highly-capable multi-tool for RFID analysis, providing reading, writing, analysis, snooping, replaying, emulation, modulation, demodulation, decoding, encoding, decryption, encryption for any RFID system operating in the 125KHz, 134KHz and 13.56MHz frequencies. Improvements For the PCBA 1. The chipset upgrade of RF transmitter power supply. Add the start-up delay. It solves the problem of large current and occasional self-excitation of power supply at the instant of the start-up. 2. Power supply noise is further reduced. A slight increase in reading distance. 3. FPC connector upgraded to gold-plated, wear-resistant and durable. 4. Upgrade to ROHS lead-free process. SMT uses more sophisticated equipment, which greatly improves the quality rate of consistency and reliability. 5. Reduce the brightness of the power LED. For the antenna 1. In the improved LF part of the dual antenna and the upgraded version V6.2, two switches are added to switch the Q value and tune frequency. 2. The Q value can be switched between 7 or 14, and the low Q value can be used to read and write tags requiring accurate timing, such as T5577 and EM4305. A high Q value can increase the distance to read the ID tag or simulate. 3. Frequency can be switched between 125K and 134K, So we can get the best distance at 134K.