Samsung YP-U5JQWH. Player media type: flash-media, Total storage capacity: 2 GB. Display: OLED, Display diagonal: 25.4 mm (1 "), Display resolution: 128 x 64 pixels. RMS rated power: 0.018 W, Frequency response: 40 - 20000 Hz, Signal-to-Noise Ratio (SNR): 88 dB. FM band range: 87.5 - 108 MHz. Continuous audio playback time: 20 h, Battery technology: Lithium Polymer (LiPo)