Feature 1Alarm's induction film must be dried, or there is water on the surface, open the switch will alarm again. 2Made of ABS material, durable and sturdy to use. 3Alarm sound volume is up to 120dB. 4Sensitive induction, a drop of water alarm. 5Works on pure water, mineral water, distilled water.Features: Works on pure water, mineral water, distilled water. Sensitive induction, a drop of water alarm. Alarm sound volume is up to 120dB. Made of ABS material, durable and sturdy to use. Alarm's induction film must be dried, or there is water on the surface, open the switch will alarm again. Specifications: Product name: Water Overloop Leakage Alarm Sensor Voice: more than 120dB Host size: 9.8*4.6*2.2cm/3.9*1.8*0.9in Shell material: ABS Power source: DC9V battery (Not Included) Package Weight: 60g/6.1oz Package List: 1 * Water Overloop Leakage Alarm(Battery Not Included) 1 * Sticker 1 * User Manual .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }