The ML-334S is a wireless outdoor siren with an integrated flashlight and tamper protection. It connects to compatible alarm panels using two-way wireless communication at up to 200 m in open air. Mains-powered via the supplied power supply, it also has a built-in 12 V / 1300 mAh backup battery for continued operation during a power outage.

The unit works with ML-300K and ML-ST331V alarm panels and is suitable for exterior wall mounting on houses or commercial premises.

Key Features

• Wireless two-way communication with alarm panels; range: 200 m (open air)
• Built-in LED flash that operates in standby mode as a visual deterrent
• Built-in tamper protection
• Backup battery: 12 V / 1300 mAh — maintains operation during mains failure
• Compatible with ML-300K and ML-ST331V alarm panels
• Designed for outdoor (external) installation

Product Benefits

• The LED flash provides a constant visible deterrent even when the alarm is not active
• Two-way communication confirms the siren has received arm/disarm commands from the panel
• Built-in backup battery means the siren continues to function if the mains power is cut by an intruder
• Tamper protection alerts the panel immediately if the enclosure is opened or removed from the wall
• 200 m open-air wireless range allows flexible positioning on large properties

Technical Specifications

• Model: ML-334S
• Wireless Communication Range: 200 m (open air)
• Operating Voltage: DC 15–18 V
• Power Supply: 12 V / 1000 mA (via supplied adapter)
• Backup Battery: 12 V / 1300 mAh (built-in)
• Quiescent Current: <220 µA
• Operating Current: <1.2 A
• Flash: LED
• Tamper: Supported
• Compatible Panels: ML-300K, ML-ST331V
• Mounting: Outdoor / external wall
• Dimensions (W×H×D): 16.5 × 23 × 5.5 cm

Why You'll Love It

• The supplied power supply means the siren is ready to install without sourcing additional components
• Compact panel compatibility (ML-300K, ML-ST331V) makes it straightforward to expand an existing system
• The external flashlight continues to flash in standby, signalling to passers-by that the property is protected
• Robust outdoor housing protects the electronics in exposed installations