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Name: Tuya Smart WiFi Siren Alarm System Work with Amazon Alexa/Google Assistance
Model: PST-DD01
◆App Name: Tuyasmart;
◆Wireless transmission range: 100meters(Open area)
◆Power: CR2032 3V Lithium Cell battery;
◆Wall-mounted Installation
◆ 433Mhz 1527;
◆ Can not work alone, only can work with PST-H1; 
Introduction
Specifications
User Manual
Youtube Video
PST-DD01 Specifications
Name DingDong Button for PST-H1
Model PST-DD01
Color White
Material ABS
Power Supply  CR2032 3V Lithium Cell battery
Wireless frequency 433MHz
Wireless transmission range 100meters(Open area)
Operation Temp. –10°C to +50°C
Work Can not work alone, only can work with PST-H1
Humidity 5%--95% non-condensing
Installation Wall-mounted
Dimension 5x7x2cm
Weight 50g
PST-DD01 Package List
DingDong Button x1
Double-sided tape x1