Reviews Audiobook Players With Battery Level Display

JENSEN JCR-231 Digital AM/FM Dual Alarm Clock Radio with Wave Sensor

  • AM/FM Receiver with PLL Tuning and 20AM + 20FM Presets, Auxiliary Input Jack for Connecting Your iPod, MP3 or other Digital Audio Players.
  • Dual Alarm with Snooze and Weekend Cancellation, Wake to Radio or Alarm, Sleep to Radio, 7 Time Zones and Daylight Saving Time Switchable.
  • 1.2” Green LED Display, High/Low Dimmer Control, Calendar and Indoor Temperature Display, Power Saving Mode - Display Automatically Turns Off after 15 seconds to Conserve Energy.
  • Infrared Snooze Sensor, Infrared Display Indoor Temperature, Alarm Time or Radio Frequency Sensor.
  • Power: AC120V 60Hz, Battery Back-up for Clock: 1 x CR2032 Lithium Battery (Not included).
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Valcom IP PoE 4 Digit 4 Inch Clock

  • ...l alarm clock can be set as two separate alarms for couples with different routines or as a backup for waking up heavy sleepers. There are 4 optional alarm sounds and 3 adjustable volume levels for you to choose..
  • 【USB Charging Port】For this dual alarm clock, there is a slow charge USB port - very good for phone battery..
  • 【NOT battery powered】The built-in button battery works for memorizing the time and alarm settings in the case of the main power outage. During the power outage, the screen will go blank and the alarm will not sound, but the clock will display the correct time once power returns. Note: The alarm clock is powered by mains only, not battery powered..
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Digital Sound Level Meter,Sound Meter for Classroom Home Street,30-130dBA dB Meter to Measure Noise,Noise Decibel Reader,Audio Sound Tester,Sound Testing equipmetent,Sound Measurement Device

  • 【LCD with backlight】After power-on, the backlight will automatically light up and turn off after 30 seconds. Press the backlight button to turn on the backlight..
  • 【Automatic SHUTDOWN】3 minutes after the stop button, the meter will automatically shut down to save power..
  • 【Low power indicator】 When the battery voltage decreases to a certain extent, the battery symbol in the upper right corner of the display will light up. In this case, the battery should be replaced..
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Gossen Digisky Digital GO 4039 Exposure Meter for Flash and Ambient Light for Cameras,Black

  • ...ion of f-stop for film speeds ranging from 2 to 1000 fps and open aperture angles from 45° to 315°, measurement of illuminance or luminance.
  • DYNAMIC CHANGE-amongst various cameras by means of presetting's and selection of 3 camera profiles and a filmmaking profile..
  • MODERN POWER SUPPLY-rechargeable lithium-ion battery, charging via USB port and external mains power pack, display of charging status and battery level, approximately 8 hours of continuous operation without shutdown.
  • EXTREMELY LONG RECHARGEABLE BATTERY LIFE-can be extended to as long as 4 weeks by reducing display brightness, with automatic display and device shutdown, measured values and settings are retained.
  • COMPREHENSIVE METERING METHODS-incident and reflected light measurement with spherical or flat diffuser and adjustable measured value display in full, 1/2 or 1/3 increments.
  • INDIVIDUALIZED CORRECTION-entry of correction values: EV 15 in 1/10 increments.
  • FLEXIBLE AMBIENT LIGHT MEASUREMENT-aperture or shutter priority preselection with exposure value display and additional digital and analog display of measured value deviation from the selected exposure level.
  • CONTRAST RANGE CONTROL-measurement of subject and lighting contrast, display of minimum, maximum and mean values for preselec....
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Pro Trek

  • tough solar (solar powered), 100-meter water resistance, electro-luminescent backlight, full auto el light, low-temperature resistant (-10 °c/14 °f).
  • digital compass, altimeter, barometer, thermometer, duplex lc display, world time, sunrise, sunset time display, stopwatch, countdown timer, 5 daily....
  • hourly time signal, battery level indicator, power saving (display goes blank to save power when the watch is left in the dark), full auto-calendar,....
  • approx. battery operating time: 6 months on rechargeable battery (operation period with normal use without exposure to light after charge) 23 months....
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Pro Trek

  • tough solar (solar powered), 100-meter water resistance, electro-luminescent backlight, full auto el light, low-temperature resistant (-10 °c/14 °f).
  • digital compass, altimeter, barometer, thermometer, duplex lc display, world time, sunrise, sunset time display, stopwatch, countdown timer, 5 daily....
  • hourly time signal, battery level indicator, power saving (display goes blank to save power when the watch is left in the dark), full auto-calendar,....
  • approx. battery operating time: 6 months on rechargeable battery (operation period with normal use without exposure to light after charge) 23 months....
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Cadrim Decibel Meter - Digital Sound Level Meter, Self-Calibration Decibel Reader, Noise Meter with LCD Display Measurement Range 40-130 dB spl Meter (Battery Included)…

  • ...a large clear LCD backlight display that can show the measurement clearly. Long press "Hold" to turn on the backlight to get the easy reading during the night and reduce the damage to the eyes..
  • 【Auto Power-off Function 】When the decibel reader is not used, it will automatically turn off after 15 minutes to save battery life. (With a 1x 9v battery, a single 9v battery can last for 30 hours.).
  • 【Convenient and Lightweight 】Cadrim sound pressure level (SPL) meter is lightweight and easy to carry. With a mounting hole for the tripod，which can be placed on the stand and is easier to measure when your hands are busy. It's widely used in factories, transportation, car, baby room and audio system offices, sound quality control in homes, schools,s, and construction sites..
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Amazfit Zepp Z Smart Watch for Men, Health Fitness Tracker, Alexa Built-In, 15 Days Battery Life, Blood Oxygen, Heart Rate, Sleep & Stress Monitoring, AMOLED Display, for Android Phone iPhone(Brown)

  • SOPHISTICATED TITANIUM ALLOY CRAFTING: The Zepp Z case is a single piece of polished titanium alloy, making it both lightweight and strong enough for advanced uses like aviation, and also features a special nanotech-coated touchscreen for enhanced resistance to scratches and fingerprints..
  • OVER TWO WEEKS OF BATTERY LIFE: Combining a customized large capacity battery and a highly-optimized power management system, the Zepp Z delivers a battery life of up to 15 days in daily use mode and a battery life of over 30 days in long battery life mode..
  • A DISPLAY THAT NEVER RESTS: The AMOLED display is always-on, waking up every time you raise your wrist, with a 326 ppi display vividly reproducing a 100% NTSC wide color spectrum, resulting in an extraordinary level of detail..
  • HEART RATE & STRESS LEVEL MONITORING: The Zepp Z can provide all-day heart rate monitoring and elevated heart-rate warnings, and also monitors your stress levels to help you understand when you need to relax..
  • SLEEP QUALITY & SpO2 LEVEL MEASUREMENT: Blood-oxygen saturation level is an important physiological indicator, and so the Zepp Z can track and monitor your blood-oxygen level, as well as accurately monitoring your deep, light, and REM8 sleep stages, awake time, and afternoon n....
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Decibel Meter, LONVOX Digital Sound Level Meter with 30 to 130 dBA Measuring Range, Backlit LCD Display, MAX/MIN Noise Measurement, Data Hold, SPL Meter for Classroom, Noisy Neighbor, Office, Factory

  • ...ip and rubberized sides ensure the decibel meter is easy to hold. The decibel measurer has a 1/4″ mount thread for attachment to a stand, in terms of sound level measurement in different environments..
  • [Power Saving & Long-lasting Design] – LONVOX dB noise meter features an automatic power-off function to extend battery life. When the sound level meter is not in use for around ten minutes, it will power off automatically. The battery indicator shows the current battery level and works as a reminder for users to replace batteries in time. Three durable batteries are included, and battery life is around 14 hours with the backlight off and 8 hours with the backlight on respectively..
  • [What You Get] – The LONVOX decibel meter kit includes 1 x Decibel Meter, 1 x Windscreen, 1 x User Manual, and 3 x 1.5V AAA Battery. Customer services are our top priority. If there are any concerns, please feel free to contact our professional technical support team for quick assistance. We are LONVOX, and we are always here at your service!.
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