Features and high qualityBuilt-in high capacity rechargeable battery 3.7V 400mA.The voice recorder have high quality recording micro with intelligent dynamic noise reduction providing you with a full clear recordings and playback easily.Voice activated recorder for a business meeting lecture class conference travelling investigation or evidence.It's very small you can take it anywhere.It is very covert; real-time recorder.Specifications:Material:ABS Color:Black Built-in Memory: 8G16G 32G(Optional) Size: Approx.100x35x12.5mm/3.94x1.38x0.49inUSB 2.0 Port Play Format: WAV MP3Recording format: Standard (SP) MP3 192KBPSLithium Battery :3.7V 400mASupported Operating System:Win 7/8/10Signal Shielding:70dBFrequency Response: 20Hz-20KHzOperating temperature:-5 to 40Note:Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors the picture may not reflect the actual color of the item.Package Includes:1x Voice Recorder1x Cable1x Earphone1x Manual Playback Formats:mp3 Record Audio Format:MP3 Origin:Mainland China External Memory:No With Speakers:No Material:ABS Color:Black Built-in Memory:8G,16G, 32G,(Optional) Size:Approx.100x35x12.5mm/3.94x1.38x0.49in Play Format:WAV, MP3 Recording format:Standard (SP) MP3 192KBPS Lithium Battery:3.7V 400mA Supported Operating System:Win 7/8/10 Frequency Response:20Hz-20KHz Operating temperature:-5 to 40