Optional Add-ons

ControlFreq specialise in mobile technology so we stock the associated accessories like external antennas to get the job done. If you need advice, give us a call on 020 3478 0786 – 7 days!

Optional add-ons for any GSM system enhance the functionality, improve reliability and make the installation easier to finish on the first visit. We recommend considering the available options for your chosen system.

The key benefits of add-ons are the small price for extra functionality for an overall easier installation and better system for the end customer.

External Antennas

ControlFreq offer a range of external antenna options to cover all eventualities. If you're unsure which antenna will suit your application, speak to our technical team on 020 3478 0786.

System Enhancements

Optional power supplies, battery back ups, enclosures and other kit to make the job easier, better, faster. If you're unsure which will suit your application, speak to our technical team on 020 3478 0786.

Battery Backup
Battery Backup
Battery Backup
Battery Backup

Battery Backup


Managed Services

ControlFreq offer a range of services to go with our GSM systems. We offer contract SIM cards, specialist software, professional configuration services. If you'd like to discuss any of these, speak to our technical team on 020 3478 0786.

What our customers say...

Called for support on a 10 year old GSM Intercom and blown away by how helpful this firm are. Highly recommended to trade & end-users alike!

Andy Howell - TRADE Installer 

Recently purchased a number of temperature sensors for some critical rooms and the support provided to set up and configure was phenomenal. Couldn't have asked for better, the after-sales help and guidance was first class.

Denise Laing - Property Manager (CBRE)

Fantastic to work with, regular suppliers of ours for years now. Looking forward to more work together in years to come.

Calvin Fergason - GATE automation ENGINEER (AUTOMATE SYSTEMS)

Always immediately available to help with tech issues and very knowledgable. I can’t recommend ControlFreqUK more, if only all customer service was like this, Keep it up!

Nick Howes - Alarm engineer

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

Lee Barnes - Security integrator

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.

Dean Burton - Access Control Installer