138 _ appendixPRODUCT SPECIFICATIONS (Continued)Output Frequency Range 20Hz~20kHzSignal to Noise Ratio 89 dB with 20 kHz LPF(based on 1kHz 0 dB)Supported Number ofFiles/FoldersFile: Max. 10000 (Including 4000 Music Files)Folder : Max. 10000 (Including File)Play Time (when usingthe earphones)Music : Max. 30 hours (MP3 128kbps, Volume: 15, NormalSound Mode , LCD Off)Video : Max. 5 hours (Brightness 5, Volume: 15, NormalSound Mode)Temperature Range forOperation -5~35°C (23~95°F)Case Tempered Glass, Plastic, AluminumWeight 80gDimensions (WxHxD) 52.7 X 102 X 9.9 mmSpeaker Power Output 0.6W MonoImpedance 8ȍFrequencyRange 400 Hz ~ 20 kHzFM RadioFM Frequency 87.5~108.0MHz FM T.H.D 0.8%FM Signal toNoise Ratio 45 dB FM UseableSensitiivity 38dB