Dahua Emergency Exit Button
Features
· Photoelectric control technology to prevent the mechanical
failure
· Ultra-low temperature design, more safe and more durable
· Ultra low power design, more durable and more environmental
protection
· 500,000 electricity aging test
· Built-in reverse current protection circuit
· A microprocessor chip control circuit
https://www.dahuasecurity.com/asset/upload/download/ASF900_datasheet.pdf