... very suitable for your Hotel,Supermarket,House,promotion etc. Motion sensor sound module is very suitable for your Hotel,Supermarket,House,promotion ... .1)When people close to or pass by motion sensor sound module and pre-recored sound will start to play.2)Your custom ... color will be welcomed.3)We have motion sensor sound modules of three different sizes,Separatly 30mmx40mmx23mm(h),90mmx60mmx20mm(H), ...