1、Loud siren can hear it within 1000 meters 2、Four working modes are available to suit different needs. 3、It can be used for 30 days after charging once. 4、Waterproof design, can also be used normally in rainy days. 5、Suitable for the safety of residential house,farm,villas, hotels,markets,boarding house and other places where requiring security alarm. 1* Alarm 2* Screw 1* English manual Material: ABS, solar panel 5v* 0.6W polysilicon Size: 6.9*12cm Rated power: 1W Voltage: 3.7V Protection level: IP65 Life expectancy: 100000h Working power: 3.7 Measuring range: 5-8M Charging time: 6-8 hours Alarm sound: 110 decibels (1000 meters to hear) Sensing distance: 5-8 meters (affected by ambient temperature) Induction angle: 110 degrees of the mold sensing angle Battery parameters: 3.7V*400mAH full capacity polymer lithium battery