●【Multiple unlocking methods】: Jacchozhi Smart Door Lock comes with Fingerprint + IC card + password + APP control + mechanical key. Paired with wifi gateway, remote and alexa unlocking can be achieved. Provide the elderly and children with an additional friendly option to unlock, never worry about being locked out again. ●【Semiconductor Fingerprint Response】: This smart door handle equipped with biometric fingerprint recognition technology can recognize your fingerprint in just 0.3 seconds, Faster and more accurate. ●【Convinient Management】With TTlock app, manage all your smart locks effortlessly in one place. Authorize admins, generate codes, share e-keys, and track activity with ease. The ultimate choice for Airbnb hosts and self-housing residents, providing unbeatable convenience and security. ●【More Security】Our smart lock guarantees the highest level of privacy for your fingerprint sensor and user data. IP66 weatherproof rating, it withstands extreme temperatures (-20°F to 122°F) and is perfect for outdoor use. ●【After-sales Guarantee】30-day refund from the date of purchase, free exchange within 1 year. If you have any product problems, please be sure to contact us first, we will solve your problem in detail.