Button module, connects to indoor monitors as a doorbell.  Features:  Lightweight, ultra slim design. With mechanical button. Ideal for indoor and outdoor use. Included rain cover.  Technical specification:  • Casing: PC + ABS. • Working environment: -40 ° ~ + 60 °, 10% –90% RH. • Water resistant: IP65. • Installation: Surface mount. • Dimensions: 140.7mm Ч 50.7mm Ч 27mm. • Weight: 80 g. • Color: light grey. • Warranty 24 months.