K2-4G multiway GSM audio intercom in stainless steel with high contrast LED backlit keys (inbuilt 4G antenna)

High quality Meanwell HDR 15-15 15VDC 1A PSU (included)

Contract SIM card with unlimited calls, SMS & data (optional)

Easy online configuration & management services tools for trade

K2-4G | Anti-vandal 4G-VoLTE GSM Intercom (2 way)

Intercom calls on 5 phones (per button)
Door release by phone keypad
Keypless PIN entry
Time-day-date restricted PIN codes
Inbuilt 'gate hold-open' timeclock
Set up by SMS, PC, App or Web-browser

MOBILE TECHNOLOGY FOR PROFESSIONAL INSTALLERS & INTEGRATORS

Why don't we sell online?

ControlFreq has been selling online since 2009. We're now actively seeking reseller partners.

Over the past two years we have developed the 'Alpha Control Ecosystem' [ACE]. We have made the decision to concentrate our focus on the core technology, as a manufacturer & cloud service provider, while hardware sales are channelled through online partners.

New and existing customers can purchase directly from us, offline, until suitable Reseller channels are in place, at which time we will direct all online sales through partners. This is a transition we have decided to make to focus on 'Made in Britain' manufacturing & the connected services to compliment our products.

If you would like to become a reseller please connect with us to arrange an intro call and demo meeting.

All technical support and paid services like contract SIM cards, managed services & cloud management subscriptions will be provided by ControlFreq directly.

When an end purchaser activates a ControlFreq product, these services become available.

Excellent

4.96 based on

210 reviews

Alan F

Verified Customer

I’m sure once it’s updated it’ll work well like it has done before.Thank You.

11 months ago

Jim H

Verified Customer

As always, excellent advice, customer service and delivery from Noel, thanks again. Calum

United Kingdom, 11 months ago

Coverall S

Verified Customer

Products are just solidly reliable. Support is top notch.

2 years ago

Tim J

Verified Customer

Excellent Service and Support

Plymouth, United Kingdom, 2 years ago

John S

Verified Customer

Very good service

Newry, United Kingdom, 2 years ago

Anonymous

Verified Customer

Technical support was helpful

2 years ago

Darren C

Verified Customer

The product arrived as per the time notified, packed in a very good way with plenty of protection for the electronics. technical assistance was fantastic in helping with the set-up of the system and the website ordering was very simple. In simple terms fantastic service and would not hesitate to use them again

United Kingdom, 2 years ago

Mike

Verified Customer

Truly excellent customer service… We bought a GSM intercom about 7 years ago and it’s been pretty much bulletproof until today (or so I thought!) It had stopped dialling when the button was pressed, wouldn’t respond to any SMS commands and there was a quiet buzz coming from the speaker. I feared the worst. After cycling the power off and on in time-honoured IT department fashion, and after removing and reinserting the SIM, I called ControlFreq expecting bad news, “sorry we can’t help you”, “you’ll need to upgrade” or some other expensive variant of reply. Steve spent some time on the phone with me, advising and trying to diagnose the issue but when there were no signs of life from the internal LEDs, the system was pronounced dead. Steve then suggested that maybe there wasn’t power getting to the system which I was pretty skeptical about because how else would it have the power to make a buzzing noise, right? However, swapping the 12v supply that’s been doing the job perfectly well for 7 years sorted the issue immediately and our system is working perfectly again. How many other places can you go for this kind of help and advice on a product that was bought 7 years ago and has probablyj been superseded several times over? That’s truly excellent customer service! Thanks

2 years ago

Roger J

Verified Customer

Great service and advice as usual, thanks!

Hackney, United Kingdom, 3 years ago

Lee B

Verified Customer

Great customer service and back up. Equipment works without fault, talked through step by step commissioning sequence. Highly recommended

3 years ago

Kenneth S

Verified Customer

GSM Gate Opener / Remote Control (3G) 200 user with Caller ID time restrictions

Works well

Galway, Ireland, 4 years ago

Michael H

Verified Customer

Always get excellent service from this awesome company. Great technical assistance Thank you as always

4 years ago

Leon C

Verified Customer

I've used th G1-3G and G1-3GW 3G remote opens and they are great products with good technical support. The administration plans for their GSM openers are a little pricey if you need to alter authorised users a lot but you can do this by text message for free. I've tried a few mobile phone remote relays and these are by far the most polished product with a great set of features and ease of use.

4 years ago

Winston H

Verified Customer

great products and service

4 years ago

Russell M

Verified Customer

Very happy with the advice, great to be able to speak to someone who understands the requirement.

4 years ago

Peter S

Verified Customer

Extremely good service and equipment. Thank you very much Kind regards

4 years ago

Keith S

Verified Customer

Great tec advice always helpful

4 years ago

Simon O

Verified Customer

Very quick process to place an order and received next day

4 years ago

Wasiim D

Verified Customer

ControlFreq is one of my favourite suppliers. Technical staff always availble for tips and advise. Never had any issue with any products or orders.

4 years ago

Dale S

Verified Customer

great product Use it all the time Support is the best.

4 years ago

Ricky h

Verified Customer

Excellent item . Great service

4 years ago

Steve l

Verified Customer

Great products. And customer service. From sales team . After sales support couldnt be better . Noel and his team from technical support, Are always on hand to go the extra mile to help with any product purchased . Highly recommended .

5 years ago

Liz

Verified Customer

Noel was extremely patient and helpful, both with getting the monitoring system powered back up & then with entering the contacts. Very helpful indeed. Thanks.

5 years ago

Dene B

Verified Customer

What a great company to deal with. A quality product at a good price. The service is literally the best Ive experienced. Whenever I've needed support its been pretty much immediate very impressive. Thank you.

5 years ago

James H

Verified Customer

Excellent service as usual great products

5 years ago

John d

Verified Customer

GSM Auto-Dialler for Instant SMS Alarms [2G & 3G] Default Title

should be very good.

5 years ago

Martyn s

Verified Customer

Ordered 2 parts which I got wrong, they were straight on the phone to help me sort my order, with excellent advice and customer service. Very helpful. The product quality was first class. Amazing company to deal with. Highly recommended.

5 years ago

Tommy D

Verified Customer

Very helpful, fast service

6 years ago

Karl P

Verified Customer

G1-3G autodiallers Great kit easy to install and use. Set up very simple but using txt you can miss icons out. So double check. Noel from Control Freq is very friendly and promptly replies if you need help.

6 years ago

Product Detail

Please note, the above video shows the K1-4G not K2-4G. The difference is simply an additional call button. K2-4G video coming soon!

K2-4G | Anti-vandal 4G-VoLTE GSM Intercom (2 way)

The K2-4G is a highly configurable GSM intercom, for 2 separate properties, with remote online configuration & user management.

The unit is a robust design with brushed stainless steel fascia and powercoated stainless steel surface backbox. The IP68 antenna is pre-fitted into the top of the unit eliminating the need to install an external antenna.

The stainless steel keys on the unit are LED backlit with an IP68 silicone membrane behind for maximum protection against the ingress of water and dust.

The unit operates on 2G/3G and 4G with a 4G (vo-LTE ready) module onboard for future-proof mobile connectivity.

Door release can be activated from the user's phone keypad during a call and also at any other time by Caller-ID 'free-call', SMS, App, Web-browser or via times preset using the inbuilt 24/7/365 time-clocks (2).

The audio quality is nothing short of perfect. Configuration and user management is done via web-browser or smartphone app, primarily designed for installers.

ControlFreq apps are intended for an installer to offer a managed service to end-clients, thereby generating recurring service revenue, while providing the best possible managed service to the client – supported by ControlFreq, 7-days, by phone.