Indoor via radio sounder for AXHub system. Bidirectional communication. 868MHz frequency. AES-128 encryption. 110dB power 3 types of sound. Tamper protection. It is powered by batteries or at 12V DC. 3 types of sound: fire, intrusion and panic. Front and rear tamper protection. Degree of protection IP54. Dimensions: 90 x 90 x 30 mm.