RTR501B Wireless plus Bluetooth Enabled Temperature Recorder

RTR501B Wireless plus Bluetooth Enabled Temperature Recorder

Marsoni

M251S

$169.31

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

RTR501B Wireless plus Bluetooth Enabled Temperature RecorderRTR501B The T&D RTR500B 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. The RTR501B with its compact rugged design and internal temperature sensor can be used in environments of 40 to +80 and has an IP67 waterproof rating

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I picked this up because I wanted an energy drink that wouldn’t be loaded with sugar, and this one honestly surprised me. The flavor is really light and refreshing—not too sweet or overpowering like some other energy drinks. I’ve been using it mainly in the mornings or when I need a quick boost, and it definitely helps with energy and focus without making me feel jittery. One thing I really like is that there’s no heavy aftertaste, which I’ve noticed with other sugar-free drinks. Pros: Zero sugar but still tastes good Smooth, not too strong or artificial Gives a noticeable energy boost Cons: Might be a little too mild if you like very strong flavors The price can add up if you drink them often Overall: I’d recommend this if you want a cleaner-tasting energy drink without all the sugar. It’s easy to drink and does what it’s supposed to.

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Reviewed in the United States on April 3, 2026

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haley

Pawtucket, US

★★★★★ 5

Great!

Flavor Name: Zero Ultra, Size: 16 Fl oz (Pack of 15)

Great price for this pack, saves money in the long run! The flavor is great and love the carbonation. The sugar free flavor is my favorite.

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Reviewed in the United States on May 28, 2026

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Timothy B. Elliott

West Palm Beach, US

★★★★★ 5

My go-to energy drink for years, no crashes or headaches

Flavor Name: Zero Ultra, Size: 16 Fl oz (Pack of 15)

Consistent energy, good taste, and no weird side effects ✔️ Sugar-free with no crash ✔️ No headaches or jittery feeling ✔️ Clean, smooth energy boost ✔️ Good flavor without being overly sweet ✔️ Reliable enough for long-term daily use ✔️ Subscription makes it easy to keep stocked I’ve been buying Monster Zero Ultra for years and have it on subscription. It’s the one energy drink I consistently go back to. I've tried most others and they all leave me feeling weird. I actually feel a noticeable energy boost from it, but without the downsides I’ve had with other drinks. No headaches, no weird jittery feeling, and no crash later on. The flavor is also solid (this one and Ultra Violet are my go tos') , not overly sweet, and easy to drink regularly. I only buy sugar-free energy drinks, and this checks that box without sacrificing taste. I limit myself to one a day after the gym and water the rest of the day. After trying a lot of different brands, this is the one that’s stayed consistent for me, which is why I’ve kept it on subscription.

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Reviewed in the United States on April 5, 2026

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Laurin

Louisville, US

★★★★★ 5

Monster

Flavor Name: Zero Ultra, Size: 16 Fl oz (Pack of 15)

Great price. Cheaper than the store. Zero sugar is a game changer!

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Reviewed in the United States on May 15, 2026

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