Voice recorder.DSP noise reduction Support mobile app.Phone remote listening to sound.Built-in magnet Function 1: DSP noise reduction Memory Function 2: Precise GPS postitioning function Battery Play Function 3: Phone remote listening to sound Name: voice recorder Voice Activated Recording: Yes External Microphone: No Balanced Out: No Package: Yes Model Number: L2-L6 Playback Formats: WAV With Speakers: Yes External Memory: Yes Record Audio Format: WAV Time: 16 hours Network: 4G Please note: You need to equip the device with a SIM card, which needs to support 4G networks. The user manual is in English. Important note: 4G network logger can only be connected to the phone to view, the computer can not view. Material: plastic colour: Black Package Contents: 1 x Voice Recorder 1 x USB Cable 1 x English instructions 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.