The iSNATCH HeySense is a wireless magnetic contact sensor that monitors whether a door or window is open or closed. It connects over 2.4GHz Wi-Fi and communicates with the HeySmart app on Android or iOS, delivering push notifications in real time so you know the status of any monitored entry even when away from home.

The sensor consists of two parts: a transmitter (70×21×24 mm) fixed to the door or window frame, and a magnet (41×18×15 mm) attached to the moving part. Maximum contact distance between the two pieces is under 15 mm. It runs on two AAA 1.5V batteries, with a standby draw of under 45μA to extend battery life.

Key Features

• Smart Wi-Fi magnetic contact sensor (2.4GHz)
• Push notifications via HeySmart app: open, close, or both, with low-battery alert
• Configurable notification triggers: open only, close only, open and close
• Supports smart home automations (e.g. trigger a light when a door opens)
• Two-piece design: TX unit 70×21×24 mm + magnet 41×18×15 mm
• Maximum contact detection distance: <15 mm

Product Benefits

• Real-time push notifications let you monitor entrances remotely — useful for tracking when children arrive home or detecting unexpected entries
• Configurable notification modes (open only, close only, both) reduce alert fatigue by sending only the events you care about
• Integration with other HeySmart devices enables automations: for example, automatically turning on a light when a front door opens
• Low standby consumption (<45μA) significantly extends battery life compared to devices with higher idle draws
• Wireless installation removes the need to run cables to doors and windows, simplifying setup in any home

Technical Specifications

• Power Supply: 2×AAA 1.5V
• Standby Consumption: <45μA
• Consumption in Alarm: <130mA
• Wi-Fi: 2.4GHz
• Maximum Contact Distance: <15 mm
• Operating Temperature: 0°C ~ +45°C
• TX Dimensions: 70×21×24 mm
• Magnet Dimensions: 41×18×15 mm

Why You'll Love It

• No hub or gateway required — the sensor connects directly to your existing 2.4GHz Wi-Fi router
• The HeySmart app allows scheduling notifications so alerts only arrive during hours you specify
• Two-battery AAA power is easy to source and replace anywhere
• The compact TX unit (70×21×24 mm) sits discreetly on a door frame without dominating the entrance aesthetics