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.

Temperature Controller 1650w 15a Btc211 Dual Digital Outlet Thermostat Plug

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.

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₩119331

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Description

🌡️ Master your microclimate with precision and ease!

DUAL RELAY POWER - Simultaneously manage heating and cooling devices up to 15A/1650W—perfect for complex environments.
VERSATILE DURABLE - Waterproof 3m sensor and wide voltage range (110-240V) make it ideal for fermentation, BBQ, reptiles, and aquariums.
BUILT IN SAFETY ALARMS - Stay worry-free with high/low temp alerts and compressor delay protection to extend device life.
PLUG PLAY SIMPLICITY - Effortless setup with intuitive button control—get precise temp control in seconds.
REAL TIME DUAL DISPLAY - Monitor current and target temperatures side-by-side for instant, confident adjustments.

The bayite BTC211 Temperature Controller delivers reliable dual-stage heating and cooling control with a powerful 1650W output. Featuring a dual digital display for real-time and set temperatures, it supports simultaneous heating and cooling devices via dual relay outputs. Designed for safety and durability, it includes high/low temperature alarms, compressor delay protection, and a 3-meter waterproof sensor, making it perfect for fermentation, BBQ, reptile habitats, and aquarium temperature management.

Specifications

ASIN	B01KMA6EAM
Additional Features	Programmable
Backlight	Yes
Best Sellers Rank	#39,142 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #41 in Temperature Controllers
Brand	bayite
Brand Name	bayite
Color	Black
Control Method	Touch
Control Type	Button Control
Controller Type	PLUG AND PLAY
Customer Reviews	4.5 out of 5 stars 1,461 Reviews
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.
Power Source	Battery Powered
Product Dimensions	2"D x 4.5"W x 4.5"H
Product Style	Digital
Shape	Rectangular
Special Feature	Programmable
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	1.0 Count
Voltage	110 Volts
Wattage	1650 watts

Reviews

K**R

12.01.2026

E**S

20.08.2020

J**.

24.04.2026

E**D

22.06.2021

L**E

14.04.2026

G**.

20.11.2024

R**E

17.07.2022

C**R

1.03.2019

B**Y

12.01.2025

N**P

2.10.2020

R**5

19.08.2021

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Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

₩119331

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered 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 South Korea.

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