Feature:Best MP3 watch with RF function,build-in rechargeable battery and high quality voice record. Night LED light RF(Radio Frequency) mp4 Watch Player Top grade calendar waterproof Support a variety of acoustic formats:MP3.WMA High quality voice recording & playback Function Six EQ mode select Line-in Includes Repeat A-B and Repeat Mode Mobile U-disk storage High speed USB2.0 Built-in 128MB-2GB Flash memory Rechargeable Battery