The Curtain motion detector has two PIR sensors built in.  It detects movements up to 10 meters and ignores movements of pets. The battery age is about 3 years, after that you can simply replace the batteries. 
 
Suitable for indoor use.
2 PIR sensors
Operates up to 1,700 meters away 
Detection angles 6°/90°
Detects movements up to 10 meters away
(domestic) animal friendly up to 15kg and up to 40cm   
Power supply CR123A battery, 3 V
Operates at temperatures from -10°С to +60°С
Battery life: Up to 3 years
IP class: IP54
Dimensions: 134mm44mm36mm