GreenBlue Wireless Reed Switch / WiFi Door/Window Sensor, Android/iOS, 3.0V DC, LR03x2, with Alarm, GB478

Tuya Smart WiFi Window/Door Sensor

WIRELESS DOOR AND WINDOW OPENING SENSOR – CONTROL AND PEACE OF MIND EVERY DAY
The GreenBlue GB478 wireless door and window sensor is a practical solution for those who want better control over their home without the hassle. Once installed, it notifies you when doors or windows are opened or closed, making it easier to ensure the security of your apartment, home, or office, and to quickly check if everything is locked—even when you’re away from home.
TUYA AND SMART LIFE (ANDROID / IOS) – STATUS, NOTIFICATIONS, AND OPENING TIME IN ONE APP
The device works with the Tuya and Smart Life apps on Android and iOS, making operation convenient and intuitive. On your phone, you can see the current status of the door or window and enable notifications to help you respond when it matters. Additionally, the sensor allows you to track the duration of opening or closing within the app, making it easier to monitor how long a door or window remains in a given state. This solution works well both for everyday use and when you want to monitor your home remotely.

AMAZON ALEXA AND GOOGLE HOME – CONVENIENCE AT YOUR FINGERTIPS
The GB478 sensor is compatible with Amazon Alexa and Google Home, allowing you to enable voice control and use the device as part of a larger smart home system. This lets you quickly check if the door is locked or incorporate the sensor into your home routines without constantly reaching for your phone.
AUDIBLE ALARM – AN ALARM YOU CAN CUSTOMIZE TO THE SITUATION
The built-in audible alert allows the GB478 to function not only as a sensor with app notifications but also as a local on-site warning. You can adjust the alarm volume, and when you need complete discretion—turn the sound off completely. The maximum volume is up to 80 dB, so the alarm is clearly audible and can effectively alert household members or deter an unwanted attempt to open the door.
ALARM DURATION ADJUSTMENT 5–180 SECONDS – AS LONG AS YOU NEED
The sensor allows you to set the alarm duration between 5 and 180 seconds. This allows you to choose a short signal as a "reminder" (e.g., pantry door, cleaning supplies cabinet) or a longer alarm when you want a stronger protective effect.

Specification:
- Manufacturer: GreenBlue
- Model: GB478 W
- Color: white
- Material: plastic
- Power supply: 2x 1.5 V AAA batteries (not included)
- Standby current: ≤180 µA
- Operating current: ≤70 µA
- Volume level: 80 dB
- Alarm volume adjustment: 0-100%
- Alarm duration adjustment: 5–180 s
- WiFi standard: 2.4 GHz 802.11b/g/n
- Magnetic control distance: ≥15 mm
- Operating temperature: -10°C to +55°C
- Operating humidity: 10%RH–99%RH
- Compatible apps: Tuya, Smart Life (Android / iOS)
- Voice control: Amazon Alexa and Google Home
- Operation indicator: blue LED
- Installation: double-sided tape (included)
- Transmitter dimensions: 58 x 17 x 13 mm
- Receiver dimensions: 92 x 21 x 26 mm
- Applications: doors, windows, cabinets (depending on installation)
- Operating modes: armed / disarmed (manual arming and disarming available)
- App features: status overview, event history, automations/scenes, notifications, arming/disarming schedules

Set contains:
- GreenBlue GB478 Wireless WiFi Reed Switch / Door/Window Sensor
- Double-sided tape
- User manual
- Manufacturer's packaging

MANUAL ARMING AND DISARMING – QUICK CHECK WITHOUT HASSLE
The GreenBlue GB478 allows for manual arming and disarming, which is convenient when you want to quickly change the sensor’s operating mode on the spot. This is practical, for example, when you’re airing out your home, moving things around, or simply don’t want the sensor to trigger at that moment.
ARMING SCHEDULES – THE SENSOR WORKS WHEN IT’S SUPPOSED TO
An additional advantage is the ability to create schedules that automatically arm and disarm the sensor at specific times. You can set the device to be armed at night, during work hours, or when you’re away, and to operate during the day in a mode tailored to your home’s routine. This is a convenient solution because you don’t have to remember to switch modes—the system does it for you.
SMART SCENARIOS – A HOME THAT RESPONDS JUST THE WAY YOU WANT
In the TUYA and Smart Life apps, you can create smart scenarios with other devices so that the sensor does more than just report an opening. In practice, this means that a single simple event, such as a door opening, can trigger a scheduled action in your home. This is a very convenient solution because you can tailor automations to your habits and the time of day, and everything runs in the background—discreetly but effectively.

- Detection of doors and windows opening and closing
- Status preview in the app – quick information on whether a specific door or window is currently open or closed
- Event notifications on your phone – useful when you want to know if someone has opened a door, window, or, for example, a cabinet
- Compatibility with Tuya and Smart Life – a popular smart home ecosystem, allowing you to easily add and manage devices in one place (Android / iOS)
- Integration with Amazon Alexa and Google Home – the sensor can function as part of your smart home and routines
- Automations and scenes in Tuya/Smart Life – ability to set other devices to react to opening/closing
- Built-in audible alert – with volume control and the option to mute completely
- Maximum alarm volume up to 80 dB – a clear warning signal when you need an immediate response
- Alarm duration adjustment from 5 to 180 seconds – adjust the response from a short warning to a longer alarm
- Manual arming and disarming – quickly switch modes, for example, when airing out your home or when you’re at home
- Arming/disarming schedules – the sensor can operate automatically according to a schedule (e.g., arming at night or when leaving for work)
- More control away from home – a convenient solution when you’re at work, away on a trip, or want to keep an eye on your loved ones’ home
- Discreet design – a small device that is unobtrusive and does not detract from the interior’s aesthetics
- Wireless installation – no need to drill into walls or run wires; simply stick it on using the included double-sided tape
- Help with daily organization – practical for children (coming home), the elderly, in the office, or in a small business (monitoring door openings during specific hours)
- Color: white