Features WIFI 2.4 G mobile APP Face version (CAMERA Color Night Vision) Two-way Audio & LIVE VIDEO 55 second Fingerprint-Password- Mechanical key Emergency IC 13.56 MHz MIfare card Screen 4.5 Inch When door handle is opened manually notification is sent to the mobile phone Safety and protection for children not open the door Temporary Password (Repeat time) to open the door from the application Fingerprint response sensitivity of 98.9% 300 USERS 10 of them admin 50 face 100 Fingerprint 100 card 40 password It's Talk English, Arabic, Chinese Anti-theft alarm Working temperature -20 degrees Celsius to 70 degrees Celsius Working humidity relative humidity 15%~93% Material: aluminum alloy + electroplated tempered glass, all copper lock cylinder Battery lithium 7.4 V 4200 mA Battery service life Door opening times ≥3000 times There is emergency power input 5V 2A Micro USB OR TIP-C