PST Smart Wi-Fi Door & Window Sensor

PST Smart Wi-Fi Door & Window Sensor (PST-MC400S)

Know the moment a door or window moves — from anywhere. The PST-MC400S connects directly over 2.4GHz Wi-Fi, so there's no hub, no bridge, and no extra hardware to buy. Just stick it on, pair it with the Smart Life app, and your home starts talking to you.

Key Features

• Instant push notifications the moment a door or window opens
• Built-in 90dB siren for on-device alerts
• No hub required — connects directly over 2.4GHz Wi-Fi
• Smart Life app control — monitor status, set automations, and manage alerts remotely
• Voice control via Amazon Alexa & Google Assistant
• Low battery alerts so you're never caught off guard
• Easy DIY installation — adhesive tape or wall mount, no tools needed
• Works on doors, windows, cabinets, safes, and drawers

Smart Automation Ideas

• Turn on lights automatically when the main door opens
• Receive alerts if a door or window is opened while you're away
• Trigger a siren or camera recording when combined with other Smart Life devices
• Turn off the air conditioner automatically when a window is opened

Specifications

• Model: PST-MC400S
• Connectivity: 2.4GHz Wi-Fi (IEEE 802.11 b/g/n)
• App: Smart Life
• Voice Control: Amazon Alexa, Google Assistant
• Alarm: Built-in 90dB siren
• Sensor Type: Magnetic Door/Window Contact Sensor
• Battery: 2 × AAA (LR03) — not included
• Low Battery Alert: Yes
• Magnetic Gap: ≤15 mm
• Operating Temperature: -10°C to +50°C
• Humidity: 5–95% RH
• Material: ABS Plastic
• Color: White
• Installation: Adhesive Tape / Wall Mount
• Weight: Approx. 85 g