Musical Module Voice Module Recording Module Light flash module Infra-red control module Gift Item Recording Module Enquiry 0 item (s) Product Information KN-309RS Motion sensor control recording module L58 x W48 x H25 mm Motion sensor detect & activate recorded message , 10 sec , 20 sec, 30 sec duration available , it can record own message anytime by pressing record button . Battery "AAA" x 3 pcs .