1、Electric Lock: Typically an NC (normally closed) fail safe electric lock that automatically locks when power is disconnected, enhancing security. Specifically designed for access control applications. 2、APP Unlocking: Support wifi for Tuya APP. You can add user and open the door with the mobile phone APP at anywhere. Also, you can click reminder information to view logs. It's very convenient. 3、Delay Time: You can open the door with it remotely, the distance up to 30 meter. Can add maximum 40pcs remotes. Support 0, 5, 10 seconds locking delay time adjustable, default is 5 seconds, providing flexible switching modes for convenience (Momentary mode, latch mode, toggle mode). 4、Buzzer Receiver: The multifunctional remote receiving device features built in buzzer, allowing users to hear the buzzer sound when the door is unlocked. Built in diodes, real time protect relay, door lock, and buzzer to extend service life. Built in DC power line for easy use. 5、Easy to Use: Unlock the door easily using the for Tuya APP or by pressing the wireless remote transmitter. When you are not at home, you can unlock the lock for friends and family remotely through the mobile APP, eliminating the need to stand by the door waiting to unlock. Suitable for access management in homes, offices, shops, and various other locations. Item Type: WiFi Door Access Control Kit Material: ABS Plastic, Stainless Steel, Aluminum Alloy Weight: Approx. 870.00g / 30.69oz Remote Control (Battery Not Included): Each Remote Control Needs 1 x Battery Receiver Size: Approx. 75x45x25mm / 2.95x1.77x0.98in Exit Button Size: Approx. 90x35x26mm / 3.54x1.38x1.02in Cathode Lock Feature: NO Power off Lock, NC Power off Open Frequency: 433.29MHz Support Transmitters: up to 40 Operating Modes: Momentary Mode, Latch Mode, Switch Mode Operating Distance: 160ft / 48.8m Delay Time: 0, 5, 10 Seconds 1 x Buzzer Receiver 2 x Remote Control 2 x Remote Control Accessory 1 x Plug 3 x Instruction Manual 3 x Accessory 4 x Screw 1 x Electric Lock 3 x Screw 1 x Accessory