this alarm last for my entire trip -lrb- 1 week -rrb- , the alarm be loud enough , it have a flash blue light as well - which would be handy for someone hard of hearing . it be easy to use , the price be right and it arrive just in the nick of time . and , I like the way it be design - fold up to protect the button so in the crush of luggage it do not inadvertently activate the alarm and drain the battery .