CMX Stingray889X 4GB. Player media type: flash-media, Total storage capacity: 4 GB. Display resolution: 160 x 128 pixels. Audio formats supported: MP3, WMA, WAV. Headphone connectivity: 3.5 mm. Continuous audio playback time: 10 h, Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 200 mAh