The 4-wire intercom system is a Video Door Phone or doorbell connected by 4 wires. The system is stable and does not require any intermediate equipment, so it is very popular. It is very easy to connect and has a competitive price. price, so it is very popular and can be used for apartments, villas, single houses and hotels.
This is a new 4-wire intercom system developed by our company, which is easy to operate and fully functional. The development of this set of products in full accordance with needs of people and the development of modern household living requirements. It`s full embodies the company's product people-oriented development line.
What we will introduce to you is our company's new product - 4 wire doorbell, it supports connecting multiple indoor units(up to 6pcs) and multiple cctv cameras(up to 2pcs) , international 4-wire connection method, easy installation and affordable price, here are some videos about us The parameters of doorbell:
1. Support to connect 2pcs outdoor units, 6pcs indoor units and 2pcs CCTV cameras at the same time;
2. Support to make a call, view the image of the visitor, and switch to another device for monitoring;
3. Support to check the outdoor units when answering the call from the indoor unit;
4. Support photo and video functions;
5. Support inserting SD memory card;
6. Support outdoor unit and monitoring cycle monitoring;
7. The wire video transmission and decoding speed is fast, and it can effectively improve the clarity of video images, reduce interference, and make the intercom voice clear;
8. The longest transmission distance is 100 meters;
9. New UI interface, menu operation;
10. The indoor unit operation mode adopts full touch operation;
11. The display screen adopts 800×480 resolution, the image is clear and transparent, and the color is true;
12. The outdoor unit has the function of automatic light supplement at night;
13. The indoor unit has a key unlocking function, which can easily open the door without going out;
14. The indoor unit has a do-not-disturb mode, and the mute can be adjusted during rest;
15. The indoor unit is equipped with an automatic camera, and each call button will automatically take a picture and store it;
Our factory has been focusing on video intercom for 11 years, we can provide various systems of intercom equipment and complete solutions, and we regularly launch new products and new functions, if you are interested, you can send an inquiry to us, we would be highly appreciated to send you our new products and new functions regularly, so that you can get our latest information at first time.
4 Wire Intercom System,4 Wire Video Intercom,4 Wire Door Entry System,Video Intercom Zhuhai Mingke Electronics Technology Co., Ltd , https://www.mingke-tech.com
It is reported that the second supplement of the 2010 edition of the “Chinese Pharmacopoeia†(hereinafter referred to as the “supplementâ€) has been completed, and for the first time, the limits for sulfur dioxide residue of Chinese herbal medicines and tablets have been clearly defined.
The supplements make it clear that Chinese herbal medicines and decoction pieces (other than mineral-derived Chinese herbal medicines, the same below) have no more than 150 mg/kg of sulfite residues (calculated as sulfur dioxide, the same below), yam, Achyranthes, Pueraria, Asparagus The residual amount of sulfite in 10 kinds of Chinese herbal medicines such as Tianma, Tianma, Trichosanthes, Baihe, Baizhu, Atractylodes, and Codonopsis can not exceed 400 mg/kg.
Tu Pengfei, a professor at the School of Pharmacy of Peking University, said that at present, the basic conditions for the cultivation of Chinese herbal medicines and the initial processing of producing areas are mostly individual farmers, and the sulfur fumigation method is still a simple and easy method for traditional practice. During the processing of Chinese medicinal materials, the sulfur dioxide gas generated from the combustion of sulfur can kill insect pests in the medicinal materials and inhibit the activity of bacteria and molds. The sulfite compounds formed have antioxidant effects and are conducive to the processing and storage of Chinese medicinal materials.
"Sulfite can be used as an antioxidant to moderately add to foods, but sulphur over-fumigating herbs may present potential safety risks." Tu Pengfei said, therefore, set residual limits to prevent abuse. 