Col linear Load Test 50kg--110pounds.
Dual Voltage 12/24 VDC(Adjustable).
The Standard Voltage is 12VDC when Finished.
MOV Provides Reverse Current Protection.
Low Power,Environmental Protection.
Anti-Residual Magnetism Design.
Professional Design,  Dual Insulate Housing.
Automatically close the smoke proof door when fire happens.
CE Certificate. 

YD-607 is a door holder with fireproof plastic cover. Anti-Residual Magnetism Design.Automatically close the smoke proof door when fire happens. It Combines build-out release button for testing and build-in MOV to reverse current protection.