Other Components

Compatibility:  STS-4xx Series (Full List in Description)

• Extend Range 400 Ft
• Wireless Transmit Distance ≥5000 Feet
• Wireless Receiving Distance ≥390 feet
• Wireless Emitting Frequency Of 433MHz

Compatibility:  STS-4xx Series (Full List in Description)

• Adds Up To 24 More Wireless Zones
• Add Up to 8 Wired Zones

This zone expander will increase the number of zones that are allowed on our STS-451 panel. It can add an additional 24 wireless zones or an additional 8 wired zones to the alarm system.

Compatibility:  STS-451 Alarm Systems

• Listen-In Through Microphone By Phone

Compatibility:  STS4-DORN Door/Window Sensors

• Replacement Magnet Strip for STS4-DORN Sensors
• Leave Window Open Without Bypass



Extra magnetic strips are perfect for leaving your windows open at night without bypassing the zone. If the window is moved by a burglar during the night, the alarm system will still sound an alarm.

Compatibility:  STS4-DORP Door/Window Sensors

• Replacement Magnet Strip for STS4-DORP Sensors
• Leave Window Open Without Bypass



Extra magnetic strips are perfect for leaving your windows open at night without bypassing the zone. If the window is moved by a burglar during the night, the alarm system will still sound an alarm.

Compatibility:  STS4-DORA Door/Window Sensors

• Replacement Magnet for STS4-DORA Sensors
• Leave Window Open Without Bypass



Extra magnetic strips are perfect for leaving your windows open at night without bypassing the zone. If the window is moved by a burglar during the night, the alarm system will still sound an alarm.

• Save up-to 20% on Insurance Premiums
• Receive by fax, email, or post office mail

Compatibility:  STS-3xx Series (Full List in Description)

• Strong Double-Sided Sticky Foam Pads
• Cut To Size of Door/Window Sensors

Compatibility:  STS-4xx Series (Full List in Description)

• Easy Angle Adjustment
• Replacement Mounting Bracket for Motion Detectors

Compatibility:  STS-4xx Series (Full List in Description)

• Easy Angle Adjustment
• Replacement Mounting Bracket for Motion Detectors

Compatibility:  STS-4xx Series (Full List in Description)

• Perfect for Locking Alarm Box (STS-451 & STS-455 Alarms)
• Includes 1 Lock And 2 Keys

Compatibility:  STS-4xx Series (Full List in Description)

• Perfect for Protecting Alarm Boxes
• Audible Tamper Alarm
• Comes With Tamper Switch and Mounting Hardware