Upgrade, Replace & Expand Your Alarm System

Looking for replacement alarm remotes, motion detectors, sirens, keypads, batteries or communication modules?

Home Security Online stocks a wide range of genuine security alarm accessories compatible with leading brands including Ness, Hills Reliance, Hikvision and Ajax.

Whether you're replacing a faulty component, adding protection to a new area of your home, or upgrading an older alarm system, you'll find the parts you need with fast Australia-wide delivery and expert local support.

Popular Alarm Accessories

• Alarm Remotes & Key Fobs
• Motion Detectors (PIR Sensors)
• Door & Window Reed Switches
• Alarm Keypads & Touchscreens
• Internal & External Sirens
• GSM & 4G Communication Modules
• Alarm Batteries
• Wireless Receivers & Expansion Modules

Why Buy From Home Security Online

✓ Australian security specialists

✓ Genuine branded products

✓ Expert compatibility advice

✓ Fast shipping Australia-wide

✓ Secure online ordering

Frequently Asked Questions

Are alarm accessories universal?

Not always. Many accessories are designed for specific alarm systems or brands. Always check compatibility before ordering or get in touch and tell us what you need

How do I know which alarm remote I need?

The easiest way is to check the model number on your existing remote or alarm panel. If you're unsure, contact us with a photo and we'll help identify the correct replacement.

Can I upgrade my old alarm system?

In many cases yes. Older Ness and Hills Reliance systems can often be upgraded with new remotes, sensors, keypads and communication modules.

What is the most common alarm accessory replacement?

Alarm batteries, remotes, motion detectors and keypads are among the most commonly replaced security alarm accessories.

Do you ship alarm accessories Australia-wide?

Yes. We supply alarm accessories to customers across Australia with fast dispatch and delivery.