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$54.00
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You'll never run out of power again! If the battery on your smartphone or tablet is running low... no problem. Just plug your device into the USB port on the top of this portable battery charger, and then continue to use your device while it gets recharged.
With a recharge capacity of 5200 mAh, this charger will give you 1.5 full recharges of your smartphone or recharge your tablet to 50% capacity.
When the battery charger runs out of power, just plug it into the wall using the supplied cable (included), and it will recharge itself for your next use.
Design Details
Many different types of early stethoscopes. Catalog of instruments and medical supplies,1 869. The stethoscope is an acoustic medical device for... more
Dimensions
1.80" W x 3.875" H x 0.90" D
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1 - 2 business days
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Many different types of early stethoscopes. Catalog of instruments and medical supplies,1 869. The stethoscope is an acoustic medical device for auscultation, or listening to the internal sounds of an animal body. It is often used to listen to lung and heart sounds. It is also used to listen to intestines and blood flow in arteries and veins. The stethoscope was invented in 1816 by René Laennec. It consisted of a wooden tube and was monaural. His device was similar to the common ear trumpet. In 1840, Golding Bird described a stethoscope he had been using with a flexible tube. Bird's stethoscope had a single earpiece. In 1851, Arthur Leared invented a binaural stethoscope, and in 1852 George Cammann perfected the design of the instrument for commercial production, which has become the standard ever since. By 1873, there were descriptions of a differential stethoscope that could connect to slightly different locations to create a slight stereo effect, though this did not become a standar...
$54.00