Factory Direct Sales Double a Calculator DS-9000k Real Person Pronunciation 12-Digit Extra Large Display Durability Metal Cover

In today's daily life, electronic calculators are no longer the main tool for calculation. However, there are still many regions and occasions where electronic calculators are needed. Below are some tips for maintaining electronic calculators.

Steps/Method: Replace the battery in time: When the displayed reading becomes dim, it indicates that the battery has been exhausted. It should be replaced in time. If the calculator is not used for a long time, the battery inside should be removed to prevent battery leakage from corroding and damaging the calculator.

Prevent Crushing: Avoid Hitting or Dropping: Both the fluorescent digital display calculators and the LCD display calculators have glass display components that are easily broken. These components should be strictly protected from being crushed, hit, or dropped to prevent damage.

Pay attention to the use environment: The LCD calculator can only be used in the temperature range of 0-40 degrees Celsius, and it is not suitable for use in direct sunlight due to the ultraviolet rays in the sun that can accelerate the aging of the LCD screen. It is also not suitable for use and storage in humid and corrosive gas environments, to avoid damage to the machinery.

Keep dust-free: After use, put it into a leather case or plastic cover to prevent dust from entering. If there is dust on the panel, use a soft cloth to gently wipe it, but do not use chemicals such as gasoline, ethanol, or banana oil to clean it.




Our company's default delivery is Yunda, Shenton, ZTO, YTO, and if you need any other courier, please contact us through Alipay! YTO Express delivery in Jiangsu, Zhejiang, Shanghai, the first weight is 6 yuan, and the additional weight is charged, with a general delivery time of 12 days. Shenton Express delivery in Jiangsu, Zhejiang, Shanghai, the first weight is 6 yuan, and the additional weight is charged, with a general delivery time of 12 days. ZTO Express delivery in Jiangsu, Zhejiang, Shanghai, the first weight is 6 yuan, and the additional weight is charged, with a general delivery time of 12 days. Recommended Express delivery, as long as it is not overweight, no matter how many kinds of products you buy, only one shipping fee will be charged! For wholesale whole goods, we will use a dedicated logistics line (not including SF, Shenton, YTO, etc. courier) to deliver the products you purchased. Please consult the online customer service for the specific shipping fee. If you need to be delivered to the upstairs of your home, you can consult the local logistics delivery personnel's agreement to add money for home delivery. Given the large number of shipments every day, we will ship within 24 hours. The time of our store's shipment is scheduled at 16:00 in the afternoon.End of the day delivery. Customers must first check whether the outer packaging is intact, and whether the number of precious items is consistent. If the surface is inconsistent or the product is damaged or lost, please contact our customer service after obtaining a proof from the logistics company. Under the premise of signing the goods without contacting us, it is deemed to have accepted the "surface consistency rule" in the "Taobao transaction rules". If you later report that the goods are missing or the number is inconsistent and there are serious damage and other such problems, the company has the right to refuse to handle the situation. This is to declare that if there is any inconvenience, please understand.