Best in 7 days
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Ships within 48 hours · Estimated delivery Jul 2 - Jul 7
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Description
Basic Learning Kit Set - Blue + Black + Multi-ColoredColor Blue + Black + Multi Colored Model N A Quantity 1 Piece Material EVA Chipset ATMEGA328 English Manual Spec No Other Features 5V USB powered; External power source: 7~12V, 9V recommended; Digital input output pins: 14 (6 pins support PWM); Analog pin input; Built in flash memory: 32KB; SRAM: 2KB; EEPROM: 1KB; Clock frequency: 16MHz. Packing List 1 x UNO R3 main board 1 x Extension cable (10~80cm) 1 x 9V battery 1 x DC 9V battery lock (13cm cable)
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 305 reviews
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Product Reviews
★★★★★ 5
Top quality filters at a good price.
Style: 20x30x1
These filters are good quality. They are reinforced and hold their shape. They fit perfectly in my filter holder.
The thing I like is that the filters were bundled together and shipped in a sturdy box. Other filters I have ordered showed up in a flimsy box and were damaged.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Excellent to have on hand
Style: 16x25x1
Excellent, time-saving purchase. Sturdy, easy to install.
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Reviewed in the United States on May 27, 2026
★★★★★ 4
Great Fit and Noticeable Air Quality Improvement
Style: 12x24x1
I purchased the Filterbuy 12x24x1 MERV 8 air filters and have been very happy with them so far. They fit perfectly in my HVAC system without any gaps or issues during installation.
After replacing my old filters, I noticed the air in my home feels cleaner and there seems to be less dust settling around the house. They do a good job of capturing everyday particles and allergens while still allowing good airflow.
Overall, this is a reliable and cost-effective 4-pack of filters. Solid quality, easy to install, and a noticeable improvement in air freshness. I’ll definitely be ordering again.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
Reliable furnace filters at a good price point!
Style: 16x18x1
Great filters. Hard to find sizes. Sturdy.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Amazon very professional and reliable
Style: 14x30x1
I was very pleased with the Filterbuy 14 30 1 and it fit great and very pleased with Amazon .They are very professional
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Reviewed in the United States on May 13, 2026
