1.Mini neckband sports mp3 2.Product weight: 35g 3.Material: ABS ... is suitable for sports, leisure, office people, can use in travel, shopping, exercise, fitness, cycling, playing, dancing, entertainment, office ... comfortable and easy in the long time too.Product parameters Mini neck set sports mp3 Color: Black/White/Red/Green ... .5 hoursPower: 5 hoursStorage Temperature: -20 ° C-80 ° C; Mini Sport mp3