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RFID Reader/Writer, NFC module, MFRC522 13.56Mhz, SPI/I2C(Robotdyn)

Marsoni M251S
Sale price$182.50
Pay 4 payments of $45.62 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
RFID Reader/Writer, NFC module, MFRC522 13.56Mhz, SPI/I2C(Robotdyn)This RFID module based on MFRC522 IC can read and write MIFARE tags. The microcontroller and card reader uses either SPI or I2C for communication. The card reader operates at 13. 56MHz. This module supports MF1xxS20, MF1xxS70 and MF1xxS50 tags. It also supports contactless communication and uses MIFARE higher transfer speeds up to 848 kBs in both directions. The physical design is compact and have small size at 36x36mm only. 3. 3V and 5V power
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4.3 ★★★★★
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Graham Muir
Natrona Heights, US
★★★★★ 5
Great product
These are excellent. They work very well and help ensure a good night's sleep without a dry mouth. Ans the taste is good, unlike Berry Smoothie which is absolutely disgusting.
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Reviewed in the United States on December 12, 2024
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Verified Purchase
Zeke
Natrona Heights, US
★★★★★ 5
Amazing
perfect for dry mouth, stays secure without feeling weird. Great for sleeping, stays in place, not waking up to dry mouth.
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Reviewed in the United States on January 16, 2024
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Verified Purchase
Lee H.
Phoenix, US
★★★★★ 4
good deal
they work very well - for most of the night. However, cause throat congestion late in the night.
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Reviewed in the United States on March 27, 2025
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LadySmileShopper
Boise, US
★★★★★ 5
It works. I use every night.
I order again and again. I use overnight. It works
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Reviewed in the United States on April 28, 2025
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Verified Purchase
Tot
Pawtucket, US
★★★★★ 5
Works every time!
These mint keeps my mouth moist at night!
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Reviewed in the United States on May 21, 2026

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