Battery Capacity: 260mAh Lithium Battery: 25 hours of continuous use Working Temperature: -10℃-40℃ TF Card Expansion: Expandable to 512GB Storage Space: No Memory Card Name:Professional HD Recorder Recording Format:WAV, MP3 Write Rate:32/128/512/1024/1536 kbps Music Format:WAV, MP3 Recording Time:512kbps Battery Recording Time:About 25 hours of continuous recording in noise reduction mode at 512kbps bit rate Sampling Rate:16KHZ 48KHZ Frequency:20-20KHz Microphone:Omnidirectional Microphone Colour:Black Material:Plastic Package Contents: 1 * Digital Voice Recorder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. digital voice recorder MP3 player HD noise reduction WAV audio player portable business recorder