HC-12 433Mhz SI4463 Wireless Serial Port Module 1000m range

HC-12 433Mhz SI4463 Wireless Serial Port Module 1000m range

Marsoni

M251S

$217.50

Get it in 3 business days with 1 day shipping. Friday, May 29

HC-12 433Mhz SI4463 Wireless Serial Port Module 1000m rangeHC 12 Wireless Transceiver Modules 433Mhz are wireless serial port communication modules, It is based on SI4463 RF chip, it has built in the microcontroller, and can be configured using AT commands, Maximum output power is 100mW (20dBm) and receiver sensitivity differs from 117dBm to 100dBm, depending on transmission speed. It accepts 3. 2V 5. 5V and can be used with 3. 3V and 5V UART voltage devices (3. 3V safe). HC 12 Wireless Transceiver Modules

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I don't like the quality of those pillows. They don't have any support, super flat, it's like just using the pillow sheet without the pillow. I honestly don't get why this could even be a product. Amazon Basics brand is veryh nice but this one was a very bad one. I usually go with anything but this was worst than cheap airbnb pillows.

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Reviewed in the United States on March 15, 2026

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Natalie Sopa

Dallas, US

★★★★★ 5

Great

Size: King (Pack of 2), Style: Medium, Configuration: Hometextile

The medium density support is exactly as advertised and provides more support and firmness. The pillow is taller because of the density so maybe not great for stomach sleepers but works well for back and side sleeping. I bought this because I tried the same pillow at my sister’s house and woke up without neck pain for the first time in forever. Honestly better than my $100 pillow.

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Reviewed in the United States on May 17, 2026

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MidwestMama

Houston, US

★★★★★ 1

These are firm pillows not medium as described.

Size: King (Pack of 2), Style: Medium, Configuration: Hometextile

These pillows are much too firm to be medium density as described. They are too stuffed full of filling. They barely give when my head is on them, so my neck ends up twisted. And they are ridiculously heavy. The filling is also uneven. I wish there was a zero stars option. Definitely returning them.

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Reviewed in the United States on May 17, 2026

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Jessica F

West Palm Beach, US

★★★★★ 3

Medium Density is flat and underfilled, soft is better. Get medium if you hate life or for in-laws

Size: King (Pack of 2), Style: Medium, Configuration: Hometextile

I thought the medium density version would be a firmer version of the soft version but I was very wrong. The medium version is very flat and has no support. Medium density feels like a cheapo $2 black friday pillow that's only useful as a decoration. I suppose the medium density fill version does have its use, you can get this pillow for a guest bed. Perfect for the in laws/guests you dislike so they don't get too comfortable and overstay their welcome. The soft one is very filled and nice to sleep on. The soft one feels firmer than the medium version, probably due to the fact that its probably filled twice as much as the medium density. Would recommend to get the soft density fill version of this pillow.

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Reviewed in the United States on August 10, 2024

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Adrienne

Waukegan, US

★★★★★ 5

These are amazing!

Size: King (Pack of 2), Style: Medium, Configuration: Hometextile

Comfy and fluffy.

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Reviewed in the United States on May 21, 2026