1、Independent Recording Button: Independent recording button, one key recording prevents operation errors and tedious operations. 2、Voice Activation: When the sound is greater than 30 decibels, the recorder will start recording, and the sound is less than 30 decibels, stop recording. 3、High Definition Recording: Clear and natural, reduce distortion, can finely process faint sounds, meet your sound quality requirements. 4、Record Anywhere: It can be magnetically attached to the metal surface, so you can put it where you want, making it more portable. 5、Support OTG: Support for mobile phone OTG connection, you can play recordings, view and upload management files on mobile phone (For Android phones only). 1 x Voice Recorder1 x Headphone1 x Data Line1 x Back Clip1 x English Manual Item Type: RecorderModel: B800Material: ABSColour: BlackStorage: Support up to 128GB memory card expansion (Not Included)Recording: WAV 192kbpsPlay Format: MP3 MAV WAVSampling Rate: 16KHZBattery Type: Built in 1500mAh Lithium BatteryContinuous Recording Time: About 240 HoursContinuous Playback Time: About 130 Hours