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Kakalote Solar Security Light Alarm, IP65 LED Motion Sensor Flas


Kakalote Solar Security Light Alarm, IP65 LED Motion Sensor Flas


Product description

Color:Red - 2pcs

1. Suitable for outdoor use, IP65 water-proof, LED energy saving.
2. Applicable for home, farm, orchard construction sites where requiring security alarm.
3. 5-8 meters sensing distance ,sensing angle 110°, 110dB alarm and 1000m visible flash light.
4. Built-in lithium battery, can be rechargeable by solar energy to ensure it can be recycled for a long time.
5.Upgrade type:24-hour sound and light alarm mode, 24-hour flash silent alarm mode, night sound and light alarm mode, night flash silent alarm mode.

Type: upgrade type
Color: red shell
Material: ABS
Starting method: PIR
Switch: 4 levels(upgrade type)
Size(approx.): (W X H) 69 X 120mm
LED: 6 flashing red lights, visible at 1000 meters
Solar panel: 5V X 0.6w polycrystalline silicon
Charging mode: solar energy charging
Charging time: 6-8 hours
Alarm sound :110dB (can be heared within 1000m)
Water-proof grade: IP65
Induction distance: 5-8 meters (subject to ambient temperature)
Induction Angle: the mode induction Angle is 110 degrees
Battery: built in 3.7V X 400mAH polymer lithium battery
Working hours: sound-light alarm gt;300 times for about 45 seconds, standby for 30 days with a single charge

Package Included:
1pc * Solar Alarm Light
1 Bag * Screw
2pcs * Solar Alarm Light
1 Bag * Screw

1. Please fully charge the device under sunlight before first use.
2. If there is no enough sunlight in 3 months, the battery may run completely flat, and will decrease battery life, so please charge in time. Once it's fully charged, unlock the device and lighting system. Otherwise, it won't work anymore.
3. If there is no enough sunlight, especial in North countries. it may take longer time to fully charge the device. This is very normal for solar products.

Kakalote Solar Security Light Alarm, IP65 LED Motion Sensor Flas


Mathematics may be defined as “the study of relationships among quantities, magnitudes and properties, and also of the logical operations by which unknown quantities, magnitudes, and properties may be deduced” (according to Microsoft Encarta Encyclopedia) or “the study of quantity, structure, space and change” (Wikipedia).
Historically, it was regarded as the science of quantity, whether of magnitudes (as in geometry) or of numbers (as in arithmetic) or of the generalization of these two fields (as in algebra). Some have seen it in terms as simple as a search for patterns.

During the 19th Century, however, mathematics broadened to encompass mathematical or symbolic logic, and thus came to be regarded increasingly as the science of relations or of drawing necessary conclusions (although some see even this as too restrictive).

The discipline of mathematics now covers – in addition to the more or less standard fields of number theory, algebra, geometry, analysis (calculus), mathematical logic and set theory, and more applied mathematics such as probability theory and statistics – a bewildering array of specialized areas and fields of study, including group theory, order theory, knot theory, sheaf theory, topology, differential geometry, fractal geometry, graph theory, functional analysis, complex analysis, singularity theory, catastrophe theory, chaos theory, measure theory, model theory, category theory, control theory, game theory, complexity theory and many more.

The history of mathematics is nearly as old as humanity itself. Since antiquity, mathematics has been fundamental to advances in science, engineering, and philosophy. It has evolved from simple counting, measurement and calculation, and the systematic study of the shapes and motions of physical objects, through the application of abstraction, imagination and logic, to the broad, complex and often abstract discipline we know today.

From the notched bones of early man to the mathematical advances brought about by settled agriculture in Mesopotamia and Egypt and the revolutionary developments of ancient Greece and its Hellenistic empire, the story of mathematics is a long and impressive one.

The East carried on the baton, particularly China, India and the medieval Islamic empire, before the focus of mathematical innovation moved back to Europe in the late Middle Ages and Gravity Falls Mabel Pines Dipper Pines Anime Laptop Backpack wit. Then, a whole new series of revolutionary developments occurred in 17th Century and 18th Century Europe, setting the stage for the increasing complexity and abstraction of 19th Century mathematics, and finally the audacious and sometimes devastating discoveries of the 20th Century.

Follow the story as it unfolds in this series of linked sections, like the chapters of a book. Read the human stories behind the innovations, and how they made – and sometimes destroyed – the men and women who devoted their lives to… THE STORY OF MATHEMATICS.


This is not intended as a comprehensive and definitive guide to all of mathematics, but as an easy-to-use summary of the major mathematicians and the developments of mathematical thought over the centuries. It is not intended for mathematicians, but for the interested laity like myself.

My intention is to introduce some of the major thinkers and some of the most important advances in mathematics, without getting too technical or getting bogged down in too much detail, either biographical or computational. Explanations of any mathematical concepts and theorems will be generally simplified, the emphasis being on clarity and perspective rather than exhaustive detail.

It is beyond the scope is this study to discuss every single mathematician who has made significant contributions to the subject, just as it is impossible to describe all aspects of a discipline as huge in its scope as mathematics. The choice of what to include and exclude is my own personal one, so please forgive me if your favourite mathematician is not included or not dealt with in any detail.

The main Last Great Wilderness is supplemented by a List of Important Mathematicians and their achievements, and by an alphabetical Glossary of Mathematical Terms. You can also make use of the search facility at the top of each page to search for individual mathematicians, theorems, developments, periods in history, etc. Some of the many resources available for further study (of both included and excluded elements) are listed in the Sources section.

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