1.Mini curtain pir detector alarm 2.self-checking function 3.high sensitivity 4.non-flammable case Mini curtain PIR detector alarm:Feature:1. Suitable for door, window, terrace and ceiling protection2. Has the function of self-checking3. Vertical or level sense, high sensitivity,non-flammable case4. Alternate polarity pulse count, one or two pulse can be select5. Environment memory, automatic ...