Best in 7 days
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
HM Digital pH/TDS/EC/Temp Meter COM-300The HM Digital COM 300 is an advanced Waterproof pH TDS EC Temp Meter with superior accuracy. The meter measures four parameters: pH, electrical conductivity (EC), total dissolved solids (TDS) and temperature. Features include: 2 different conductivity conversion factors to convert EC to TDS using the 0. 5 (NaCl) or 0. 7 (442TM), as well as selectable modes for measurements in the S, mS and ppm scales. The meter incorporates automatic temperature
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.7 ★★★★★
Based on 110 reviews
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Product Reviews
★★★★★ 5
That it does what it says.
Love these they work do well on. My ipad, bought it 3 times as gifts for my friends.
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Reviewed in the United States on May 6, 2026
★★★★★ 3
Hard to hold
Color: Shades of Blue
The straps is really tight, so it is hard to hold and maneuver. Colors are what I expected. The ability to clean screens is OK
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Reviewed in the United States on June 4, 2025
★★★★★ 5
Cleans without damaging
Color: Blossom
Great little item for laptops, tablets, phone ,etc. Cleans the screen without any damage. Love the strap which makes it easier to use. The cleaning side is soft and smooth while the strap side is harder and makes it sturdier when cleaning. Another great product from Fintie!
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Reviewed in the United States on January 9, 2026
★★★★★ 5
Great cleaning job!
Color: blooming hibiscus
This cleans your IPhone so it looks like glass. The finger prints do come back as easy. I have given these away and everyone likes them. Better than the cloth.
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Reviewed in the United States on February 23, 2026
★★★★★ 5
Extremely helpful keeping remotes in order
Color: Blue, Size: Small
Nice quality remote control holder, makes it easy to find what you need, organized life is an easier life to live ! Great price too and it looks good ! This was a great little buy, I brought one for my Mom and another for the guest bedroom.
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Reviewed in the United States on December 18, 2025
