COMMAX - SmartHome & Security Professional Brand (Made in Korea) ACCESS METHODS: Up to 100 Fingerprints & 4 Password available FLEX LOCK: Set Automatic & Manual mode by switching slide inside of the Inner Body. / DUAL LOCK: Adds security by preventing the door from being opened from outside at night or at times when extra security is needed. BATTERY LOW ALERT: If the batteries are running low, the door lock informs you through Warning Light or Alarm Sounds / EMERGENCY POWER SUPPLY: If you fail to replace the batteries before they are fully discharged, you can still open the door with a 9V battery or Micro USB 5 pin. HIGH TEMPERATURE DETECTION - When the inside temperature rises to a certain level due to fire, it will unlock the door automatically with warning sounds for safety. (If the outside temperature rises first, this function does not work.)