This paper describes a study of pronunciation learning using loaned MP3-players set in a college of business and tourism in Hanoi. Material was developed to help raise student awareness of a number of pronunciation features in English that are generally problematic for speakers of Vietnamese, such as vowel length and quality, and final consonants. This material was delivered to one group of 50 students as 9 pre-recorded audio lessons on the MP3-players. Another group of 61 students were given 8 traditional classroom lessons. Both groups were recorded before and after the study to establish whether their pronunciation improved on the particular features being taught.