DAHUA Emergency Break Glass Button ASF921 has a Photoelectric control technology to prevent the mechanical failure, Ultra-low temperature design, not only is it more safe, it’s also more durable. It has 500,000 electricity aging test, Built-in reverse current protection circuit in case of high current and it also comes with an in-buit microprocessor chip control circuit.

DAHUA Security Door Closer ASF102S has a Door wight of 40~60kg, door width 950mm, 180° without positioning, Carbon steel material and Temperature: -30~60°C.