FAQ｜Frequently Asked Questions
1. Which countries do you ship to?
Note: A few remote islands/conflict zones are temporarily unavailable for delivery; contact us to confirm your country before ordering.
2. How about shipping cost?
3. Available discount & coupon rules
- Exclusive Coupon Code: YIZHAN10
Copy the code and paste it at checkout to get 10% off sitewide, valid for 7 days only.
- Tiered bulk order discount (automatically applied by cart amount):
- Spend over $200 → Extra 5% OFF
- Spend over $400 → Extra 8% OFF
- Spend over $800 → Extra 10% OFF
Tip: YIZHAN10 coupon can be used together with tier bulk discount for maximum savings.
4. Order processing & delivery waiting time
- Processing lead time: 1–3 working days for order arrangement & quality inspection from our factory.
- Delivery transit time:7-15Days( remote areas: around 20 business days)
- Shipping delay occasionally occurs due to local customs clearance or logistics control, kindly wait patiently.
5. Other common questions
Q1: Are your microscopes produced in your own factory?
Q2: Website products are incomplete, can I buy unavailable items?
Q3: Warranty policy
Contact Info
AnswerPossible Causes The interpupillary distance is not adjusted correctly. The diopter settings are incorrect. The left and right eyepieces have different magnifications. Solution Adjust the interpupillary distance until you see a single image. Re-adjust the diopter settings for both eyes. Ensure both eyepieces have the same magnification..
AnswerPlease make sure that you follow below steps:
1/Possible Causes
Dust or debris on the specimen.
Dust on the eyepiece.
Solution
Clean the specimen carefully.
Clean the eyepiece using a microfiber cloth or lens cleaning paper.
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Possible Causes The objective lens is dirty. The diopter settings are incorrect. Solution Clean the objective lens. Readjust the diopters and refocus the microscope.
Cause The microscope is not properly focused. Solution Refocus the specimen after changing the zoom level.
YCause The focusing tension is set too tight. Solution Slightly loosen the focusing tension adjustment.
YCause The focusing tension is too loose. Solution Tighten the focusing tension until the microscope stays in position.
Cause The optical path selector lever is not fully engaged. Solution Move the lever completely to the desired viewing position..
Possible Causes The power cord is not connected. The bulb is not installed correctly. The bulb has burned out. Solution Check the power connection. Reinstall the bulb securely. Replace the bulb if necessary.
Possible Causes An incorrect bulb type is being used. The power supply voltage is unstable. Solution Replace it with the recommended bulb. Use a voltage stabilizer if necessary.
TPossible Causes Incorrect bulb type. Low supply voltage. Solution Install the recommended bulb. Check the power supply voltage.
Possible Causes The bulb is reaching the end of its service life. The bulb is loose. Solution Replace the bulb. Remove and reinstall the bulb securely.
