Features: 1. Vibrating Anti-Theft Alarm, More Sensitive, Louder And 2. 10 Levels Of Sensitivity, 110db Volume, And Vibration Perception 3. One Machine With Multiple Controls, Long Standby Time, And Low Battery Reminder 4. Apply To Scenarios 5. Sensing Vibration Alarms To Deter Thieves. Before Intruders Pry Open Doors And , They Can Sense Vibrations And Provide Timely Warnings. Description: Battery Type: Host: 2 x AA Alkaline Batteries (Not Included); Remote Control: 1 27A Alkaline Battery Communication Frequency: 433Mhz (Less Interference Than 315mhz) Alarm Volume: 110DB (30cm Test) Working Temperature: -10~60°C Storage Temperature: -20~70°C Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Material: ABS colour: Black Package Contents: 1 x Host 1 x Remote Control 2 x Double-Sided Tape 1 x Chinese and English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.