Features:1. NC mode - (locked while supplied with power), fail safe mode.2. Installation: unfold install (surface mounted).3. Material: Aluminum alloy material.4. With time delay: 0s, 3s, 6s.5. Suitable For: Wooden door, Glass door, Metal door, Fireproof door, etc.6. Surface scrub treatment, durable and wear-resistant.7. Lock body use hexagon screw, fixed panel, anti-theft and more security.Specifications:Model Name: L-XXSDimensions: 150x34x28mmLock core: The diameter 12.5MM, extending the length of 15MMWorking Voltage: DC12VWorking current: Start state 1.2A Persistent state 120mAOperating Mode: NC (locked while supplied with power), fail safe modeWires: red to "NC", black to "GND".Warm Note: yellow line and white line are useless, don't need to be connected.Package Including:1 x Electric Drop Bolt Lock1 x Bag of installation kit