1.Box cover of anti-dismantle;Automatic temperature compensation 2.Resisting white light interferences, opted detection dista Functional features:(1) Box cover of anti-dismantle;Automatic temperature compensation (2) LED can choose ON & OFF; Adjust delay alarm (3) Resisting white light interferences, opted detection distance(far,midium, low)(4) adapting patch technology,resisting EMI FRI ...