one of the smallest rechargeable mp3 player watch in the world the first waterproof watch with mp3 player & recorder in the word exact timer, lifelike clear recorder, portable and use friendly nanophase materials,3-10atm waterproof 10~12 hours continuous playing when full charged powerful earphone output, much loud voice support mp3 format, usb memory disk, store the file as you like dual charging methods: usb cable or ac adapter shockproof without sound jumping red/green/yellow led light indicator