OSRAM SMART+ WiFi Outdoor Siren, 95dB, Solar, Rechargeable, 2 Speakers, Tamper Alarm, IP65, App Control, Alexa/Google; Function: Smart outdoor siren with 95dB warning tone through two redundant speakers, flashing red warning light, no light source, Safety: 3 alarm tones and 3 volume levels selectable, alarm duration adjustable from 10s to 30min, tamper and manipulation alarm, Control: SMART+ app for Android 8.0+ and iOS 14.0+, compatible with Amazon Alexa and Google Home, WiFi 2.4GHz required, Power supply: Integrated solar cell for self-sufficient energy, USB-C battery replaceable with 1x 18650 battery, charging cable included, Compatibility: Works with SMART+ sensors and cameras, IP65 weatherproof for gardens and outdoor areas, installation kit color: White