Extreme Speed 3-Pack 4 GB High-Speed MicroSD Memory Card with Adaptor (12 GB Total) EXTREME SPEED AUTHORIZED DEALER With FULL Warranty INCLUDES BONUS Instant Savings Coupon OFFERS BEST in class industrial grade microSD card performance. DESIGNED, built and tested to far higher standards of reliability and endurance. ROBUST AND RELIABLE solution for storage needs. READ Max - 21MB/s. Write Max - 18MB/s. APPLICATIONS INCLUDE specialized industrial uses, medical equipment, telematics, GPS, and networking. DESIGNED to meet strict industrial operating and environmental requirements.