Reviews Low frequency Recorder

Mini Telephone Audio Voice Recorder with 32gb Memory Landline Telephone Voice Recorder for Home & Office Analog Telephone System

  • Home Office Telephone Recorder: Designed for home/office telephone conversation voice recording, built in 32gb memory supports for 200 hours voice....
  • Reliable For Recording: Designed by Embedded lunix system with high speed MCU, makes it running stable,records crystal clear sounds from telephone....
  • Small Size: A small black box with two RJ11 ports for telephone line in out connection, plug the 5V USB power adapter to the recorder, system power on....
  • Plug & Play: Just connect the telephone cable to line in / line out port of the recorder and connect to the 5V USB power adapter to start working,....
  • Analog System Only: the Low power consumption telephone recorder only works with analog telephone system, does not support digital telephone system.
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72GB Voice Activated Audio Recorder, Voice Recorder for Lecture Meeting, HD Voice Recorder with Playback,Audio Recorder Portable Audio Recording Device USB MP3.

  • 【One-Click Recording】：One-click to start or stop/save the file, which is named after the recording date and time (timestamp function) for easy file management. The recorder measures 0.3 x 1.3 x 2.1 inches (about 0.8 x 3.3 x 5.3 cm) and weighs only 0.7 ounces (about 19.8 grams). Say no to complicated steps and record important content anytime, anywhere! The recorder is perfect for lectures, conferences, interviews, courses, personal use, and more..
  • 【Large Internal Memory Capacity And Long Battery Life】：The recorder has a built-in 72GB memory, which can record 840 hours of audio without worry, and a 320mAh rechargeable battery, which can be quickly charged within 2.5 hours and used continuously for 45 hours. The long battery life ensures this recorder is always ready to work. While charging, it works smoothly as usual, automatically saving the audio clip in the case of low battery..
  • 【High Definition Noise Cancelling Audio Recorder 】：The audio recorder uses a high-fidelity microphone, which can record high-quality audio, ensuring that the recording time is clearly visible. This recorder is equipped with a DSP intelligent dynamic noise reduction chip, which supports up to 1536 Kbps PCM lossless recording, making the recording crystal....
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Amano PIX-95 Electronic Time Clock

  • Amano PIX-75 Series Time Recorder features an atomic clock and 60 Hz frequency.
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64GB Digital Voice Recorder,Fillman Voice Activated Recorder,Small Tape Recorder with Speaker, Voice Recorder for Lecture,Meetings,Class,HD Audio Dictaphone,Intelligent Noise Reduction,MP3 Player

  • 【64GB Large Memory Digital Voice Recorders】64GB internal memory can store up to 268 hours of recording material (512kbps), Rechargeable voice recorder equipped with a 230mAh battery, voice recorder lecture can record continuously for up to 25 hours, and tape recorder can be automatically saved when the battery is low..
  • 【Quick Recording & Easy Operation】Push the Rec/Save button to start/save recording,Don't worry about missing what you want to record, 0.96-inch high-definition color display for easy operation.Recording device Built-in speaker, recording can be played directly.(It will be better if you listen with headphones).
  • 【High Quality Recording & DSP Noise Reduction】Equipped with a powerful DSP Noise Reduction chip and two sensitive microphones, Audio recorder can automatically reduce ambient noise and record/play high quality audio clearly. Support bit rate 3072kbps/1536kbps/512kbps..
  • 【Voice Activated Recorder & Password Protection】After this function is turned on, tape recorder will automatically record when the surrounding sound reaches a certain decibel, and stop recording when there is no sound. This greatly saves the storage space of the recording device.You can set a four-digit password to protect your important information..
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64GB Voice Recorders with Playback, Langkou Recording Device 1536kbps Audio Recorder, Voice Activated Recorder for Lectures, 776 Hours Digital Recorder with A-B Repeat, Study, Business, Entertainment

  • 【Voice Recorder PCM 1536kbps Recording】Langkou Voice Recorder With the latest PCM deca-core triple digital intelligent noise reduction technology(DSP), it can provide you with high quality sound at 1536kbps, as if the person speaking is standing next to you. Equipped with an exclusive omnidirectional stereo microphone that captures farther away but clearer sound..
  • 【One-Touch Recording】Super easy step-by-step recording, perfect for recording beginners. Turn the power switch on and record/save with a swipe of a button in standby, never miss an important message again!.
  • 【64GB Large Capacity in Memory】Langkou 2022 upgraded recorder has a built-in 64GB TF card expansion memory and the 64GB digital recorder can store up to 776 hours of recording files (192kbps). 270mAh rechargeable battery supports up to 12 hours of continuous recording and 24 hours of headphone playback. It is a professional recording device that fully meets all your recording needs！.
  • 【Voice Activated Recording】When voice-activated recording is turned on, the recorder only captures audio content clips that sound above 70dB. Reducing blank and whispered segments effectively saves memory space and your listening time..
  • 【Rest Screen And Automatic Shutdown】 After turning on....
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64GB Digital Voice Recorder for Lectures Meetings - Tape Recorder Audio Recording Device with Playback, 3072kbps Dictaphone Sound Recorder | Password | Support TF Expansion

  • 【Set Contents】Recorder*1, 64GB TF card*1, 3.5mm headphones*1, Micro-USB cable*1, manual*1. Product Dimensions: 3.54 x 1.26 x 0.47 inches.
  • 【1536kbps → 3072kbps Upgraded HD Recording】Our 64GB audio recorder adopts the latest PCM ten-core triple digital intelligent noise reduction technology, providing a steady performance and a clear recorded voice. Equipped with exclusive omnidirectional stereo microphone and DSP dynamic noise cancellation recording chip, which can capture farther/lower but clearer sound..
  • 【64GB Large Capacity】 Voice recorder is equipped with a large capacity of 64GB, which is three times the memory capacity of similar products on the market. Store up to 750 hours of recording files to meet your various recording needs. 250mAh rechargeable battery supports up to 20 hours of continuous recording and 12 hours of headphone playback. Support recording while charging, and has data protection function, automatically save when the battery power is low..
  • 【Power-on Password Protection】 3-digit password, 8000 combinations,Without your password,no one could turn on the device an....
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Passive Video Power Balun 8MP BNC DC to RJ45 Network Transceiver Cat5/Cat6 Adapter AHD/TVI/CVI/CVBS for Full HD CCTV DVR Security Surveillance Camera System 5 Pairs

  • ①HD-CVI / TVI / AHD/ CVBS Passive Video & Power Balun. Easy installation, using the standard UTP cable system and low voltage power supply..
  • ②Compatible with CVI, TVI, CVBS and AHD video devices, Fit for 720P/960P/1080P Max.8MP CCTV Cameras, monitor, DVR card and recorder etc..
  • ③ LED indicate green light is working model , yellow light does not working. Video transmission Via UTP CAT5/CAT6. Interface RJ45+DC+BNC..
  • ④Analog clear video signal, Anti-interference, Simultaneously transmit the frequency signal and DC power signal..
  • ⑤Transmission distance: 720P CVI/AHD / CVBS Max.984ft.
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DSO 138 DIY Oscilloscope Kit Opening Source 2.4″ TFT 1MSPS Digital Oscilloscope Kit with DIY Parts & Probe, Handheld Pocket Sized 13803K, SMD Soldered Electronic Learning Set

  • Digital DIY oscilloscope uses ARM Cortex-M3 processor and contains a 2.4-inch color TFT display, which can be used as an ARM development test board..
  • Let you effectively observe and measure signal waveforms in many occasions such as audio, video synchronization, low-frequency switching power supply, infrared receiving and transmitting..
  • Can make a tailor-made software development on the basis of this kit, which can be can be changed to millivoltmeter, data recorder, etc..
  • The variety of components is suitable for students to understand the oscilloscope structure and principles, and do in-line component welding, and chip component welding training..
  • The oscilloscope kit is a kit specially designed for professional teaching and training in electronics. Please note that this kit need to be assembled and soldered by yourself..
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64G Mini Digital Voice Recorder with 750 Hours Recording Capacity and 30 Hours Battery Time Upgraded Small Tape Recorder for Lectures Meetings Interviews Classroom MP3 Player

  • 【64GB Digital Vioce Recorder】The portable digital recorder comes with 64GB of memory and can store up to 750 hours of voice data. You can record....
  • 【One-Key Operation & Multi-functional Playback】One Touch Recording, just press the record button to start recording. You can take it out of your....
  • 【HQ Recording and Intelligent Noise Reduction】The portable digital recorder has an HQ recording microphone and intelligent dynamic noise....
  • 【Security and After Sales Service】It has a data protection function, when your battery is low, the encoder will automatically save the data to....
  • 【Mini Metal Keychain Spy Recorder】The (2.5*1.0*0.5 inch) design makes it more portable and concealable. It can be placed in your bag or pocket, so....
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