Heiman HM2WD Wireless Siren – networkable warning siren with acoustic and visual alarm

The Heiman HM2WD is a powerful auxiliary siren for wirelessly networked smoke, CO, and heat detectors, as well as compatible remote controls. It amplifies the alarm signal throughout the building – with a loud siren and bright LED flashes – ensuring greater safety, especially in larger living areas or hard-to-reach rooms.

The HM2WD can also function as a repeater in the wireless network to extend the range between devices. In the event of an alarm or low battery, the siren reacts immediately. In combination with a smart gateway, the device can also be tested, muted, and monitored via app.

Typical Applications
– Expansion of wirelessly networked warning systems with additional acoustic/optical alarm
– Use in larger apartments, houses, hallways, or utility rooms
– Integration into smart home systems with app connectivity

Technical Data
– Model: HM2WD
– Operating voltage: AC 110–240 V
– Backup battery: 3.7 V / 720 mAh, rechargeable, lasts up to 12 hours
– Alarm volume: 95 dB at 1 m (adjustable 70–100 dB via app)
– Alarm type: Acoustic + optical (LED flash)
– Communication protocol: 868 MHz
– Wireless range: ≤100 m (open field)
– Operating temperature: -10 °C to +55 °C
– Humidity: ≤95% RH (non-condensing)
– Dimensions: Ø 80 mm × 32 mm (without power plug)

Special Features
– Compatible with Heiman wireless smoke, CO, and heat detectors
– Functions as a wireless repeater for range extension
– Low battery warning
– App-controlled self-test and hush mode
– Online/offline notification in case of connection failure (after 24–48 h)
– Compact design for discreet socket mounting