Do the btc 201 / btc 211 have battery backup or memory? if the power goes off, will they resume without me resetting it when power returns?

We own the BTC211 and can definitely confirm that it has battery backup/memory.

Is there an option for a longer temperature probe cable, or a way to extend it?

Seems like you could extend it easily as it is just a standard 3.5 mm connection. Though I have not tried it. This is an excellent reliable product!

What size screw do you use for mounting it to the wall? Must have a thin head

Just try and find screws with a <1/4" diameter head and flat, good luck, they don't specify screws by head size. WTH these don't come with any hardware, IDK.

Does this Temp controller have solid-state relays or mechanical contacts?

I'm sorry, I am not a technical person. All I can tell you is - I set the parameters on the controller to keeps my greenhouse between 62 and 66 and it does all day and all night. If the temperature goes above 66 the controller will not come on until it drops to 62.

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bayite BTC211 Temperature Controller 1650W 15A | Dual Digital Outlet Thermostat Plug, Pre-Wired, 2 Stage Heating&Cooling Mode, 110V - 240V, Fermentation BBQ Reptile Aquarium

Q: Does this Temp controller have solid-state relays or mechanical contacts?

I'm sorry, I am not a technical person. All I can tell you is - I set the parameters on the controller to keeps my greenhouse between 62 and 66 and it does all day and all night. If the temperature goes above 66 the controller will not come on until it drops to 62.

Product ID: 32710514

Details

Brand
bayite
Controller Type
PLUG AND PLAY
Model Name
BYT-3A061
Product Dimensions
2"D x 4.5"W x
Special Feature
Programmable

⚡1650W max power output

🔄Dual relay for heating & cooling

🌡️Dual LCD temp display

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Description

🌡️ Master your environment with precision and ease!

SAFETY FIRST ALERTS - Stay worry-free with high/low temp alarms and compressor delay protection to extend device life.
VERSATILE DURABLE - Works from 110V to 240V with a 3m waterproof probe—perfect for fermentation, BBQ, reptiles, and aquariums.
DUAL RELAY POWERHOUSE - Simultaneously manage heating and cooling devices up to 1650W for precise climate control.
PLUG PLAY SIMPLICITY - Get started instantly with easy setup and intuitive button control—no tech headaches.
REAL TIME DUAL DISPLAY - Monitor current and target temperatures side-by-side on a crisp LCD for ultimate accuracy.

The BTC211 Temperature Controller is a robust dual-stage thermostat featuring a 1650W max load and dual relay outputs for simultaneous heating and cooling control. It offers a dual LCD display for real-time and set temperatures, supports °C/°F, and includes safety alarms plus compressor delay protection. Pre-wired and plug-and-play, it operates on 110-240V and comes with a 3-meter waterproof sensor, making it ideal for fermentation, BBQ, reptile habitats, and aquarium temperature management.

Specifications

ASIN	B01KMA6EAM
Additional Features	Programmable
Best Sellers Rank	#66,060 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #71 in Temperature Controllers
Brand Name	bayite
Color	Black
Control Method	Touch
Control Type	Button Control
Controller Type	PLUG AND PLAY
Customer Reviews	4.5 4.5 out of 5 stars (1,463)
Display Type	LCD
Included Components	temperature controoler with plug and a sensor
Item Dimensions D x W x H	2"D x 4.5"W x 4.5"H
Manufacturer Part Number	BYT-BTC211
Material Type	Plastic
Model Name	BYT-3A061
Model Number	BTC211
Mounting Type	free standing
Number of Batteries	Unknown batteries required.
Number of Items	1
Power Source	Battery Powered
Product Style	Digital
Shape	Rectangular
Specific Uses For Product	Heat Pump, air conditioner, heater or cooling fan, freezer
Temperature Control Type	Heating, cooling , both heating and cooling
UPC	711463671460
Unit Count	1 Count
Voltage	110 volts
Wattage	1650 watts

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B/.145

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fantastic experience overall. Will recommend to friends and family.

1 month ago

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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