Product SpecificationsCPU model:Distance CPU Frequency:24KHZ music playback formats: MP3, WMA, OGG, APE, FLAC, WAV, AAC-LC, ACELP, and other WAV formats (512Kbps)1536Kbps), MP3 format (64Kbps)192Kbps) Sampling frequency Headphone jack: 35MM stereo audio jackMaximum output of headphones: (L)9mW + (R)9mW(32Ohm)USB interface:3.5MM interface/DC5V-1000MAh (for this device only) Screen: 08inch Multi-View LED, Resolution 128*64 Built-in MIC: Non-Directional Capacitor Microphone Recording Current: 8mA-13mAFrequency: 24Hz Distortion:90dB signal-to-noise ratio: 006% Built-in Speaker: Dynamic2510mm, 8ohm built-in speaker output: 800mW Storage:Embedded Flash Memory (4GB-32GB optional), External TF Expansion 4GB-128GB Operating Temperature:-10℃~40℃Body Weight: 44.6g (Bare Machine) Body Dimensions: 91.5mm*34mm*13mm Power Supply Method: Lithium Battery/3.2-4.2V Battery: Lithium Ion (LiCoO2): 200mAh Power Duration: Recording Approximately 20 Hours, Playback Approximately 10 Hours (With Headphones) Supported Systems: Windows XP&Vista/2K/ME/98 (Driver Installation Required) /Mac OS 10