ACCESSORIES & OPTIONAL EXTRAS TO ENHANCE YOUR SYSTEM.

Handy optional extras and individually available accessories to add to existing GSM intercoms, GSM alarm diallers, GSM remote control systems or any other GSM or low voltage system. Control Freq GSM antennas use standard SMA male connectors and are suitable for most GSM products on the market.

GSM antennas, Power Supplies, 12V relays and GSM  battery back up. If you need some advice, call us today on +44(0)20 3478 0786