Fangrui Product Details Battery Capacity: 260mah Lithium Battery: 25 Hours Of Continuous Use Working Temperature: -1040tf 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.