Blackline GPS is a wireless location leader that develops, manufactures, and markets products and services for worker safety monitoring, covert tracking, and consumer applications. Blackline solutions deliver safety, security, and location awareness through innovative wireless hardware and custom user interfaces, including web, mobile, messaging, and web services. Blackline’s vision is to become a recognised world wide supplier.

CDI Services are a security systems installation company based in Epping, Essex. CDI Services provide service including specification, design, installation and support of intruder alarms, fire alarms, access systems, door entry systems, CCTV, TV & satellite, IRS & MATV, telephone data netwroks & door/gate automation systems for home or business, domestic or commercial premises.