1Support AI virtual wizard unlock, voice control unlock and for Amazon Alexa (buyers need to purchase TTlock's G2 gateway). 2Support fingerprint unlock, more convenient to touch, false recognition rate (FAR): 0.0001%, false rejection rate (FRR): <0.1%, recognize quickly. 3With C lock cylinder, the lock support key unlocking for emergency needs. 4Support bluetooth remote authorization to unlock, send bluetooth key or password in APP, free to set effective time, no waiting for friends to visit. 5Use 4 AAA batteries, continuous working time can up to 18 months. 6Wide applicable scenarios, fit for bedroom, office, apartment, balcony, etc.