Development of the Wrist Digital Audio Player
2001 Volume 45 Issue 1 Pages 1-7
Details
2001 Volume 45 Issue 1 Pages 1-7
MP3 is well known as high quality digital music format on PC. CASIO employed laminate lithium ion secondary battery and 6 layer PWB. It became possible to develop world smallest MP3 player. Removable earphone attachment and rechargeable battery system make waterproof. This watch enhanced wearable world.
