... . 3. Internal closed-wide flexible glue, waterproof, cushion.4. USB2.0 high-speed communication design, communication speed is 100 times of ... read 20,000 in 1 minute. No button, automatic card reader, convenient and practical.5. Sound, LED lighting, vibration triple prompted ... charge, for readers up to more than 500,000times. 8.Card reader technology: Switzerland EM sensor reader technology.9. 4M ...