Product: RK-8331FUnlock: fingerprint, password, credit card (including ID card, bank card, bus card and other chip card), mobile phone lock, spare keysLock: Standard 6068 GB mechanical lock (optional mechanical lock king)Panel material: zinc alloyThe appearance of optional color: silver, pearl nickel, bronze, red bronzeExpansion function: custom voice function, wireless remote control unlock, low voltage warning function, no sense of anti hijacking alarm function, remote APP lock function