Color: As shown in the picture Material: PC CJMCU-608 password key storage, random number generator. Secure storage of up to 16 keys, certificates, or data. Hardware support for asymmetric signature, verification, and key agreement. Applications include IoT endpoint key management and sharing, encrypted small messages and PI data, secure boot and download, ecosystem protection and control, anti-cloning, and other fields. Product Parameters ECDSA: Elliptic Curve Digital Signature ECDH: FIPS, Diffie-Hellman Series, FIPS Series Elliptic Curve Curve Support: NIST Standard P256 Elliptic Curve Random Number Generator (RNG): FIPS 800-90 A/B/C IIC Interface: 1MHz Standard IO Port Level: 1.8-5.5V Supply Voltage: 25.5V Sleep Current: <150nA PIN Description: VCC: Power Supply Positive SCL: Serial Clock Input GND: Power Supply Negative SDA: Serial Data Input Color: As Shown Material: PC Package Contents: 1*module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.