tryed a 30 day trial an in 12 days taken money from my acount twice an gave my father very bad chest pains an dissness nossea an battery didnt work proprly an loiude got in his mouth throw filter at end an please try an i sent the stuff back to company an tryed to explain this to company she was very rude an un coropteive with me am sorry but this is to much an thanks sinserly edward couey-334-470-9511