LIBO Smart Home Electric Drop Bolt Lock DC 12V Fail Safe NC Mode Electronic Door Lock for Access Control Security System with Time Delay

LIBO Smart Home Electric Drop Bolt Lock DC 12V Fail Safe NC Mode Electronic Door Lock for Access Control Security System with Time Delay

• 1, NC Mode: Fail-safe type, unlocked when power off, locked when power on.
• 2, Installation: unfold install (surface mounted).
• 3, With time delay: 0s, 3s, 6s
• 4, Wires: red to "NC", black to "GND". yellow line and white line are useless, don't need to be connected.
• 5, Suitable For: Wooden door, Glass door, Metal door, Fireproof door, etc.