RTR505B GSM/Bluetooth Multi-functional data logger

RTR505B GSM/Bluetooth Multi-functional data logger

Marsoni

M251S

$156.80

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

RTR505B GSM/Bluetooth Multi-functional data loggerThe RTR50B Series allows you to mix and match an array of wireless radio communication loggers with various Base Units or Data Collectors to meet your needs. Logged data can be automatically sent via network or mobile communication to be saved in cloud storage or to a specified location. By combining RTR505B with various optional modules, it is possible to measure temperature (Pt100 Pt1000, thermocouple sensor), voltage, current (4 20mA), and pulse.

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These things are so comfortable and warm. I sleep with them on because I like to have my feet out of the covers. Not too warm...just right. Great quality and fit with a non-slip leather-like sole. I'll keep ordering these ahead of time to make sure I'll always have a fresh pair when I wear them out. I wear them EVERY NIGHT and keep them on all morning. Life-changer! The BEST EVER!!

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Reviewed in the United States on March 4, 2026

Verified Purchase

Beth

Massapequa, US

★★★★★ 5

Comfy slippers

Size: 10-11, Color: Cable Knit Coffee

Needed these for wood floors cause socks kept wearing out.perfect slipper ..warm and durable

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Reviewed in the United States on May 9, 2026

Verified Purchase

Robert&Robbie

Bozeman, US

★★★★★ 4

Great for indoor use.

Size: 10-11, Color: Cable Knit Navy

I bought a pair of these for myself about a year ago and there are plusses and minuses to them. They are comfortable and warm, without getting my feet sweaty or whatever. That's exactly what I wanted. On the minus side, mine ran far too small. I am a 10.5-11 shoe size and the 10-11 is about a half inch too short... my heels are sliding off the back. I am reordering a size 12-13 to try that one. In the take note column, the soles are NOT rubberized in any way. In fact they are like foam, and will absorb water! Also they do not provide cushioning against any kind of rough surface. I think they are perfect for strictly inside the apartment use, but they are not like moccasins or something that allow outdoor use. And I am ordering a 2nd pair after a year so I do like them.

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Reviewed in the United States on November 24, 2025