SDB1.
A smarter
front door.
Charge your doorbell, connect it to 2.4GHz Wi-Fi and set up the wireless chime.
Download SDB1 manual ↗
Charge first. Then mount.
Remove the battery protector
Open the battery cover and remove the protective tab next to the two included rechargeable batteries before use.
Fully charge the doorbell
Use the included Micro USB cable and a suitable wall charger, sold separately. The guide specifies DC 5V / 1.5A and approximately 14 hours for a full charge.
Secure the bracket
Complete app setup before mounting. Mark and drill the mounting holes, fit the supplied anchors, then secure the doorbell with the mounting and security screws.
Connect your home. See your door.
- Open Rexing HomeInstall the app identified in your SDB1 manual and create or sign in to your account. Tap +, then Video Doorbell.
- Enter pairing modeHold the Doorbell button for about 8 seconds until the indicator flashes red. Follow the app prompts.
- Choose 2.4GHz Wi-FiSelect your home network and enter its password. SDB1 does not support 5GHz.
- Scan the QR codeHold the phone about 4 inches / 10 cm in front of the doorbell camera so it can scan the app’s QR code. Confirm when setup completes.
Share with family
From the app home screen, use Share via Email or Share via QR Code. The manual allows sharing with up to 8 users.
View and talk
Up to 3 users can view the feed at once; only 1 can use the direct intercom. Enable the app permissions needed for notifications and microphone access.
Check app availability
This model uses Rexing Home, not Rexing Connect. If you cannot find the app listed in your manual, contact Rexing before resetting or replacing your setup.
A ring you can hear at home.
Plug in the chime
First connect the doorbell to your phone, then plug the Rexing wireless chime into a wall outlet. SDB1 is compatible with the Rexing wireless chime.
Pair the doorbell
Press Connect on the chime, then press the Doorbell button to pair them.
Choose your sound
Press Tune to cycle through the 38 tunes. Press the Doorbell button again to confirm your selection. Use the chime volume controls as needed.
A clearer next step.
Why does the battery drain quickly?
Frequent motion events and opening Live View consume power. Lower motion sensitivity and fully recharge the batteries. Battery life varies with activity and settings.
Why is the Wi-Fi signal weak?
Check the distance and obstructions between the doorbell and router. Improve the 2.4GHz signal at the mounting location; the guide suggests repositioning the router or using an extender.
How do I reset Wi-Fi setup?
Hold the Doorbell button for about 8 seconds, then follow the Rexing Home setup instructions. Ensure you have the correct app and home-network credentials before resetting.
Does SDB1 use a microSD card?
No. The official guide states that SDB1 does not support SD cards. It describes cloud storage with up to 3 days of retention; current service availability and terms should be checked in the app.
Help us identify the setup
Share your SDB1 model, app version, Wi-Fi band and a photo of the indicator. Do not send your Wi-Fi or account password.
The right guide for your SDB1.
SDB1 manual
Charging, app & chime
Official V2 guide · PDF ↗
Warranty information
Review warranty and return information →
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Still need a hand?
Contact Rexing with your SDB1 model and a photo of the issue.