Product overall characteristics of the professional equipment: built-in surge absorber detection: door detects state signal output signal security types: open power scope of application: wooden door, glass door, metal door, fire door Applicable scope: wooden door, glass door, metal door, fire door Main product features introduction 1. Electric off, power is loose. 2. To eliminate the residual magnetic automatically. 3. Low noise, wind pressure resistance. 4. Cooperate with entrance guard control system can be installed in various occasions of wood, iron and fire 5. Working current: 12 v / 480 ma: 24 v / 240 ma 6. Input into the electric voltage: 12 v and 24 v 7. Sustain tension: 280 kg (600 LBS) 8. Lock body size: 250 x width x 42 long high 25 (mm)