Mobile Phone Headset is a pair of switching units that accept the electrical signals from a media player or receiver and convert them into audible sound waves using a speaker close to the ear. The headset is typically detachable from the media player and is connected by a plug. The advantage is that you can listen to the sound alone without affecting others; you can also separate the sound of the surrounding environment.
Mobile phone headset maintenance and care notes:
1: Be sure to lower the volume before use. If the volume of your output device is too large, not only damage ears, but also diaphragm folds, or even burne the voice coil of the earphone.
2: The earphones are away from strong magnets. The magnetic properties of the magnet of the unit will drop, and the sensitivity will decrease over time.
3: The earphones are away from moisture. The pads in the earphone unit will be rusted, the resistance will increase, and your earphones will be biased.
4: Keep away from chemicals. The outer casing of the earphone is very soluble in organic chemicals, so it is not good to look at it.
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In view of the company's development needs, in order to improve the efficiency of the use of raised funds and ease the pressure on the company's liquidity requirements, the company will use idle funds raised 20 million yuan under the premise of ensuring the funds required for the construction of fund-raising projects, combined with the company's financial status and production development needs. Temporary replenishment of working capital, calculated according to the benchmark interest rate of bank loans of 5.6% for the same period, can save the company financial expenses of about 560,000 yuan, realize the effective use of raised funds, and maximize the interests of shareholders. The funds are limited to the production and operation related to the main business, and may not be used directly or indirectly for new shares placement, subscription, or for investment in stocks and derivatives, convertible corporate bonds, etc.
The time limit for the temporary replenishment of working capital is 6 months. Before the expiration, the company shall return the above funds to the special account for the raised funds in full and on time. 
Recently, Huacan Optoelectronics Co., Ltd. (hereinafter referred to as "the company") announced that the 19th meeting of the first board of directors reviewed and approved the "Proposal on Temporarily Replenishing Working Capital with Partially Raised Funds".