La description

Product Description Features: 1) Power source: DC 9V, AC **0V, DC 9V and AC **0V 2) Working current: : Surveillant current<*5?́, alarm current: <*0mA 3) Alarm sound: >*5dB 4) Ambient temperature: **0 ~ *0 centigrade 5) Low battery alert: 7 days 6) Can be used separately as well as in combination of up to *0 items Packing: Packing dimensions: *2 x *0 x *0cm (**0pcs) N. W.: *0.5kg G. W.: *9kg