FEITIAN Single Button OTP c100 hardware token is an OATH-compliant, event-based, One-Time Password (HOTP) token with an LCD display.
Physical testing certified with CE: EN61000-6-2 and EN55022
FIPS 140-2 Level 3 certified: https://csrc.nist.gov/projects/cryptographic-module-validation-program/certificate/4003
https://ftsafe.us/knowledge-base/how-to-set-up-feitian-otp-products-with-x-service/