Supershop&reg; NEW Cool 4GB Waterproof IPX8 Sport Waterproof MP3 Player for Swimming/ Running Underwater Jogging/ SPA+ Waterproof Earhook Headset+ Earphone- Blue Excellent waterproof performance complying with International Standard IPX8 Supported MP3/WMA file playback. 108 MH FM radio 87MHz. built in 3.7V battery,130MA,support for fast charging function, continualy for 7 or 8 hours. The 7 memory to support 1G-16G.