General description The Tuya Wireless Smart Door Window Sensor System is designed for remote control operation and burglar alarm functionality for your home. This system features multiple alert modes to enhance security and convenience. Technical specifications Siren dimensions: 9.2 x 4.2 x 1.7 cm Remote control dimensions: 6 x 3.3 cm Material: ABS Color: White Package Contents: 1 x siren, 2 x remote control, 1 x sticker, 2 x AAA batteries Measurement error: +/- 1-3 cm Usage Light Alert: The LED light blinks once when the remote control button is pressed and continues to blink when the alarm is triggered. Anti-theft mode: Triggers sound and light alarm immediately upon door opening, even if previously closed. Welcome Mode: Emits a "Ding" sound when the door is opened. SOS mode: Manual alarm activation using the emergency key (SOS) triggers sound and light alarm. Volume adjustment: Use the "+" key to increase volume and the "-" key to decrease volume.