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3. Battery Replacement
4. Low Battery LED Indicator
5. Battery Precautions
• When battery replacement is needed, replace both AAA batteries together for the best battery lifetime.
• The design allows for battery replacement without removing the alarm from the window.
• The LED indicator will blink continuously indicating a low battery and will send a notification straight to
the user’s phone through the Wstein app.
• Use only the appropriate size batteries.
• Be sure to follow the correct polarity when installing the batteries. Incorrect polarity may cause damage
to the alarm.
• Do not mix different types of batteries, such as alkaline with carbon-zinc or old batteries with new.
• Do not recharge batteries not intended to be recharged as they can overheat and rupture.
• Batteries may result in heat generation, explosion or fire, resulting in personal injuries.
• Batteries must not be recharged, disassembled or disposed of in fire. Disposal of used batteries must be
made in accordance with the waste recovery and recycling regulations of your area.
• Keep away from small children. If batteries are swallowed, promptly seek medical attention.
When using this product follow these precautions at all times:
App Pairing
• The Wstein app is the central hub for your smart home devices.
• Control all your Wasserstein smart devices from one app.
Step 1: Download “Wstein” from the App Store, Google Play Store, or simply scan this QR code
for installation.
• Make sure your mobile device is connected to a 2.4 Ghz Wi-Fi network.
Step 2: Connect your mobile device to your home Wi-Fi network.
