FNIRSI® SFD-02 4-IN-1 Indoor Air Quality Monitor Touchscreen Formaldehyde Detector HCHO TVOC Temperature Tester

Using Environment and Precautions

The device should be stored in a soft case, and the operating environment should be at a temperature of -5~40℃, and the relative humidity should not exceed 80%.

The device should be stored in a clean and dry place to avoid moisture, mold, heavy pressure, mechanical damage,humidity and direct sunlight.

Avoid using in the rain or fog, avoid dropping or shocking.

When the screen on the LCD does not light up, it indicates that the voltage is too low, and it needs to be charged in time.

Copyrights

The product specifications are subject to change without notice, allfinal interpretation rights were reserved by FNIRSI Technology Co., Ltd, All trademarks, product images，technical parameters are properties of FNIRSI Technology Co.. Ltd. All rights reserved.

Warranty

30-Day return and refund guarantee (Refer to our Refund Policy), 2-year warranty (only available for orders purchased directly from fnirsi.com), lifetime technique support by FNIRSI.
Please feel free to reach us with any concerns:
Email: service@fnirsi.com / info@fnirsi.com
We strive to reply to you within 24 hours.

FNIRSI has started researching and development manufacturer of quality optical products including Golf rangefinder, laser,measure device and binoculars since 2016.
Focus on the development,researching, and manufacturing for over 8 years.
We are committed to delivering premium products and exceptional customer service, striving to be your most reliable and intelligent assistant.

At Fnirsi, we are committed to providing our customers with the best value for their purchases. To ensure you always get the best price, we offer a 30-day price guarantee on all products purchased directly from fnirsi.com. This policy aims to give you confidence and peace of mind when shopping with us.

What is the 30-Day Price Guarantee?

Our 30-day price guarantee means that if you purchase a product from fnirsi.com and the price of that product drops within 30 days of your purchase date, you are eligible for a refund of the price difference of the products. (Prices are based on USD. No refunds will be given for price changes in other currencies due to exchange rate fluctuations.)

How Does the Price Guarantee Apply?

• Eligibility: The price guarantee applies only to purchases made on fnirsi.com. Products purchased from other retailers or third-party sellers are not eligible.
• Timeframe: The price drop must occur within 30 days of your original purchase date.
• Product Match: The price guarantee applies to the same product (identical model, specifications, and condition).

How to Apply for a Price Difference Refund

If you notice that the price of a product you purchased from fnirsi.com has dropped within 30 days, follow these steps to apply for a refund of the price difference:

• Documentation: Prepare your order number and proof of the price drop (such as a screenshot and link to the product page showing the reduced price).
• Contact Us: Reach out to our customer support team at info@fnirsi.com .Include your order number, proof of the price drop, and a brief explanation of your request.
• Verification: Our team will verify the price drop and your purchase details.
• Refund Process: Once verified, we will process the refund for the price difference to your original method of payment. It typically takes 1-3 business days for you to receive the refund.

At Fnirsi, we strive to provide our customers with high-quality products and exceptional customer service. Our 30-day price guarantee is just one of the ways we ensure you get the best value for your investment. Shop confidently with Fnirsi, knowing that you are always getting the best deal available.
Thank you for choosing Fnirsi. If you have any questions or need further assistance, please do not hesitate to contact our customer support team at info@fnirsi.com.