1. Support format: MP3/WMA/WAV/JPEG/MP4.
2. The built-in battery in the watch can be charged either by USB or A/C transformer.
3. Be played over 9 hours for each time charging 1.5 hours.
1. Size: 1.5" true colorful screen, high resolution 128 x 128 pixel image. 2. Package included: (1) MP4 watch. (2) Stereo earphones. (3) USB adaptor cable. (4) User manual. (5) CD driver. (6) Travel charger.