100% brand new and high quality Wireless alarm sound and light security alarm sensor supports smart living home Features. Tuya ZigBee T&H&Siren 2 IN 1 sensor: detects the environment in time. Siren sound greater than 90DB. Alarm notification: Smartphone will be notified immediately when the siren alarm is triggered and check the log on the APP. Widely used in homes, kitchens, offices, etc. Smart scenarios: Smart application scenarios can also be designed and implemented in conjunction with other Graffiti-based smart WIFI products. Energy saving: Ultra-fast response, strong anti-interference capability, ultra-low power consumption and high cost performance. Support 5V 1A USB port power supply. Specifications. Standby current: 61uA-180uA USB port: 5V/1A Power supply: USB plug-in or CR123A*2 battery (battery not included) Sound intensity: 90db Detection temperature: -10C - 80C Detecting humidity: 0%-100% Wireless frequency: 2.4GHZ Communication protocol: Zigbee 3.0 Wireless standard: Zigbee IEEE 802.15.4 Wireless range: 40m Housing material: ABS Size: 68*33mm Product includes 1* Alarm sensor Notes. Due to different monitors and lighting effects, the actual colour of the item may differ slightly from the colour shown in the picture. Thank you Due to manual measurement, please allow for a 1-2 cm measurement variation.