INSTRUCTIONAL VIDEOS: Beware of the E-2 error - strips are not expired! Watch our instructional videos to optimize your testing results; videos on YouTube, our website, or here at Amazon.com/ketomojo; US-based Customer Support available to answer questions EXCEEDS FDA & INTERNATIONAL STANDARDS: The test strips utilize industry-leading technology for precision & accuracy: patented 2+2 bio signal reading; only meter with a Lifetime Warranty BEST IN CLASS CUSTOMER SUPPORT: Our knowledgeable, friendly, US-based support team is eager and ready to help you! Any issues, please don't hesitate to contact us via our company website