Wireless smoke detector Dimensions L x W x H: 115 x 45 mm Dimensions W x H x D: 115 x 45 x 115 mm Battery life: ca. 10 years Weight: 146 g AES authentication: Yes Batteries: Li-ion Battery Category: Safety technology Display: LED Modular: Sensors Outdoor area: No RS485 Bus: No System: HomeMatic Free field range: 300 m Radio frequency: 868.3 MHz