4K 10-300X40mm Super Telephoto Zoom Monocular

Mobile phone chargers can be roughly divided into travel chargers, cradle chargers and maintenance chargers. Generally, users mainly contact the first two. And the most sold on the market is the travel charger.
There are also various forms of travel chargers. The common ones are the cheap duck egg-shaped miniature travel charger, the ordinary desktop card board charger, and the high-end desktop charger with crystal display. Mobile phone charger, also known as: mobile phone adapter, is actually composed of a stable power supply (mainly regulated power supply, providing stable working voltage and sufficient current) plus necessary control circuits such as constant current, voltage limiting, and time limiting. The output parameters marked on the charger (referring to the line charger): such as output 5.0V/1A, output 5.0V/1500mA-11200... refers to the relevant parameters of the internal regulated power supply. Understand this truth, you will know that a (good quality) mobile phone charger is easy to change into a good quality regulated power supply.
The chargers of lithium-ion (li-ion) batteries commonly used in mobile phones use a constant-current and voltage-limited charging system, and the charging current is generally around C2—that is, the charging rate is two hours. For example, a 500mAh is charged at 250mA in about two hours 4. Constant voltage charging after 2V.
The lion is not suitable for the -DV/DT detection fast charging method used by the NIMH advanced fast charger, because the lion has a strict limit on the charging current. Lithium ion (Li+) is very active, and high current charging is prone to danger. The general user contacts are mainly the first two. The most popular travel chargers on the market are travel chargers. There are also various forms of travel chargers. The common ones include cheap duck-egg miniature travel chargers, ordinary desktop card board chargers, and high-end desktop chargers with LCD display. device. In view of the fact that most mobile phone users are non-professional users, the chargers basically have the function of full self-stop, and most of the travel chargers are fast chargers, and the charging time is about 1-3 hours. Many chargers on the market advertise that they are controlled by microcomputers, including some very cheap duck-egg-type miniature travel chargers. In fact, strictly analyzed from the charging circuit, only a small number of chargers can be truly controlled by microcomputers (MCU control). .
Some manufacturers claim to be "microcomputer control" when they use integrated blocks on the charging circuit. In fact, many low-cost design integrated blocks are cheap op amp integrated blocks, while some dedicated charging control integrated blocks have higher unit prices. , generally used in relatively high-end or brand-name chargers. So we can't trust the so-called microcomputer control, especially the cheap products. Many products are similar in appearance but have very different internal circuits, and their performance is also very different.Description:
OOTDTY  
[Super telephoto lens monocular]: The telescope's anti-shake system and special tripod 3D gyroscope make the telescope's field of view very stable when magnified multiple times.
[Small light night vision]: The built-in night vision function allows you to use it normally at night. Turn on the auto focus and blur the background function, brake you can focus on observing the person or object that needs to be observed.
[Lightweight and portable]: The shell is made of titanium alloy, which has higher specific strength and weighs only 1.1 pounds. When stowed, the length is only 7.87 inches, and you can easily put it in a backpack or pocket when hunting, traveling or camping.
[Waterproof, dusproof, shockproof design]: Nitrogen-filled waterproof and O-ring optical components can prevent moisture, dus and debris, and ensure the waterproof function of life.
[Ideal for outdoor sports enthusiasts and wilderness explorers]: Hand-held equipment is essential equipment for bird watching, wildlife, hunting, hiking, mountain climbing, camping, camping, surveillance and travel.

Specification (10-300X40mm):

Objective lens diameter: 30mm
Magnification: 7-17 times (corresponding to adjustment level 10X100)
Eyepiece diameter: 22mm
Exit pupil diameter: 4.2-1.7mm
Eye relief: 14-12mm
Field of view: 230-110FT 1000YDS
Field of view: 4.4-2.1 degrees
Minimum focusing distance: 2.5m
Size: 173/128x43mm (stretching and shrinking)
Prism: BAK4 prism
Coating: FMC
Colour: Black
Eye mask: rotating eye mask
Waterproof: yes
Tripod can be connected: Yes
Connected phone: yes
Used for: racing, beach, bird watching, boating/yachting, horse racing, hunting, outdoor activities, sports, theater, travel
Material: optical glass
Type: Monocular

Set Package include:
1x 10-300X40mm monocular or 10-30x30mm monocular